项目第二阶段

部分代码：

目录结构：

 1.dao层接口：

package org.exam.dao;

import java.util.List;

import org.exam.databean.choicequestion;
import org.exam.databean.fillquestion;
import org.exam.databean.student;
import org.exam.databean.stuscore;
import org.exam.databean.teacher;
import org.exam.databean.test;
import org.exam.databean.testpaper;

public interface TestDAO {
    public int save(test t);
    public String studentLogin(String account,String password);  //学生登陆
    public String teacherLogin(String account,String password);  //教师登陆
    public String adminLogin(String account,String password);  //管理员登陆
    public int savestudent(student s);  //学生注册
    public int saveteacher(teacher t);   //教师注册
    public int updatespwd(String account,String password);  //修改学生密码
    public int updatetpwd(String account,String password);  //修改教师密码
    public int updateapwd(String account,String password);  //修改管理员面膜
    public int savescore(String sid,int score);    //保存学生的成绩
    public String searchscore(String sid);  //教师查询学生的成绩
    public int updatestudent(student s);  //修改学生信息
    public int updateteacher(teacher t);  //修改教师信息
    public String searchcardnumber(String account, String password);  //查询身份证
    public String searchStime();   //查询考试开始时间
    public String searchTime();  //查询考试时长
    public List<choicequestion> findchoiceques();   //查询考卷选择题的信息
    public List<fillquestion> findfillques();  //查询考卷填空题的信息
    public List<testpaper> findanswer();   //查询考卷试题的答案
    public int searchallpage(String type,String keyword);   //查询选择/填空总页数
    public int savechoiceq(choicequestion c);  // 保存选择考试试题
    public int savefillq(fillquestion f);   //保存填空考试试题
    public int searchallfill(String keyword);  //搜索总的填空题数
    public int searchallchoice(String keyword);  //搜索总的选择题数
    public int searchnowtest();   //查询当前试卷的题数
    public int savefill(List a);  //保存填空题
    public int savechoice(List a);  //保存选择题
    public int deletefill(int id);  //选择填空题
    public int deletechoice(int id); //删除选择题
    public int updatefill(fillquestion f);  //修改填空题
    public int updatechoice(choicequestion c); //修改选择题
    public List findtitle(int page,String type,String keyword);//分页查询所有选择/填空试题
    public int deletetestpaper(); //删除试卷
    public int savetime(String stime,String time);  //保存时间
    public int deletetime(); //删除时间表
    public List<stuscore> findscore(); //查询所有学生的成绩
    public int existtime();//判断考试时间表是否存在
    public int existscore();//判断学生成绩表是否存在
    public int deletescore();//删除成绩表
    public List<teacher> searchteacher(String keyword, String select,int page); //查询教师信息
    public List<student> searchstudent(String keyword, String select,int page); //查询学生信息 
    public int findtea(String keyword,String select); //查询教师信息的总页数
    public int findstu(String keyword,String select); //查询学生信息的总页数
    public int searchteaallpage(String keyword,String select); //查询教师信息的总记录数
    public int searchstuallpage(String keyword,String select);//查询学生信息的总记录数
    public int deletestudent(String id);  //删除学生表
    public int deleteteacher(String id);  //删除教师表
}

TestDAO

2.dao层接口实现类 

package org.exam.dao.impl;

import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import org.exam.dao.TestDAO;
import org.exam.databean.choicequestion;
import org.exam.databean.fillquestion;
import org.exam.databean.student;
import org.exam.databean.stuscore;
import org.exam.databean.teacher;
import org.exam.databean.test;
import org.exam.databean.testpaper;
import org.exam.util.DbUtil;



public class testdaoimpl implements TestDAO{
    public int save(test t)
    {
        String sql="INSERT INTO test(name,password)values(?,?)";
        PreparedStatement ps = DbUtil.executePreparedStatement(sql);
        int result = 0 ;
        try {
            ps.setString(1, t.getName());
            ps.setString(2, t.getPassword());
            result = ps.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        DbUtil.close();
        return result;
        
    }

    @Override
    public String studentLogin(String account, String password) {
        // TODO Auto-generated method stub
        String sql="select sname from student where sid='"+account+"' and pwd='"+password+"'";
        ResultSet rs = DbUtil.executeQuery(sql);
        String result= "null";
        try {
            if(rs.next())
            {
                result=rs.getString(1);
            }
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        DbUtil.close();
        return result;
    }

    @Override
    public String teacherLogin(String account, String password) {
        // TODO Auto-generated method stub
        String sql="select tname from teacher where tid='"+account+"' and pwd='"+password+"'";
        ResultSet rs = DbUtil.executeQuery(sql);
        String result="null";
        try {
            if(rs.next())
            {
                result=rs.getString(1);
            }
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        DbUtil.close();
        return result;
    }

    @Override
    public String adminLogin(String account, String password) {
        // TODO Auto-generated method stub
        String sql="select aname from administrator where adid='"+account+"' and pwd='"+password+"'";
        ResultSet rs = DbUtil.executeQuery(sql);
        String result="null";
        try {
            if(rs.next())
            {
                result=rs.getString(1);
            }
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        DbUtil.close();
        return result;
    }

    public int savestudent(student s) {
        // TODO Auto-generated method stub
        String sql="INSERT INTO student(sid,sname,sex,cardnumber,pwd,department,phone)values(?,?,?,?,?,?,?)";
        PreparedStatement ps = DbUtil.executePreparedStatement(sql);
        int result = 0 ;
        try {
            ps.setString(1, s.getSid() );
            ps.setString(2, s.getSname());
            ps.setString(3, s.getSex());
            ps.setString(4, s.getCardnumber());
            ps.setString(5, s.getPwd());
            ps.setString(6, s.getDepartment());
            ps.setString(7, s.getPhone());
            result = ps.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        DbUtil.close();
        return result;
    }

    public int saveteacher(teacher t) {
        // TODO Auto-generated method stub
        String sql="INSERT INTO teacher(tid,tname,sex,cardnumber,pwd,title,phone)values(?,?,?,?,?,?,?)";
        PreparedStatement ps = DbUtil.executePreparedStatement(sql);
        int result = 0 ;
        try {
            ps.setString(1, t.getTid());
            ps.setString(2, t.getTname());
            ps.setString(3, t.getSex());
            ps.setString(4, t.getCardnumber());
            ps.setString(5, t.getPwd());
            ps.setString(6, t.getTitle());
            ps.setString(7, t.getPhone()); 
            result = ps.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        DbUtil.close();
        return result;
    }

    @Override
    public int updatespwd(String account, String password) {
        // TODO Auto-generated method stub
        String sql="update student set pwd='"+password+"' where sid='"+account+"'";
        PreparedStatement ps = DbUtil.executePreparedStatement(sql);
        int result = 0 ;
        try {
            result = ps.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        DbUtil.close();
        return result;
    }

    @Override
    public int updatetpwd(String account, String password) {
        // TODO Auto-generated method stub
        String sql="update teacher set pwd='"+password+"' where tid='"+account+"'";
        PreparedStatement ps = DbUtil.executePreparedStatement(sql);
        int result = 0 ;
        try {
            result = ps.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        DbUtil.close();
        return result;
    }
    
    @Override
    public int updateapwd(String account, String password) {
        // TODO Auto-generated method stub
        String sql="update administrator set pwd='"+password+"' where adid='"+account+"'";
        PreparedStatement ps = DbUtil.executePreparedStatement(sql);
        int result = 0 ;
        try {
            result = ps.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        DbUtil.close();
        return result;
    }

    @Override
    public int savescore(String sid, int score) {
        // TODO Auto-generated method stub
        
        String sql="INSERT INTO stuscore(sid,score)values(?,?)";
        PreparedStatement ps = DbUtil.executePreparedStatement(sql);
        int result = 0 ;
        try {
            ps.setString(1,sid);
            ps.setInt(2,score);
            result = ps.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        DbUtil.close();
        return result;
    }

    @Override
    public String searchscore(String sid) {
        // TODO Auto-generated method stub
        String sql="select score from stuscore where sid='"+sid+"'";
        ResultSet rs = DbUtil.executeQuery(sql);
        String result="null";
        try {
            if(rs.next())
            {
                result=rs.getString(1);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
        DbUtil.close();
        return result;
    }

    @Override
    public int updatestudent(student s) {
        // TODO Auto-generated method stub
        String sql = "UPDATE student SET sname=?, sex=?,"
                + "cardnumber=?,pwd=?,department=?,phone=?"
                + " WHERE sid=?";
        
        PreparedStatement ps = DbUtil.executePreparedStatement(sql);
        int result = 0 ;
        try {
            
            ps.setString(1,s.getSname() );
            ps.setString(2, s.getSex());
            ps.setString(3, s.getCardnumber());
            ps.setString(4, s.getPwd());
            ps.setString(5,s.getDepartment());
            ps.setString(6, s.getPhone());
            ps.setString(7,s.getSid());
            result = ps.executeUpdate();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        DbUtil.close();
        return result;
    }

    @Override
    public int updateteacher(teacher t) {
        // TODO Auto-generated method stub
        String sql = "UPDATE teacher SET tname=?, sex=?,"
                + "cardnumber=?,pwd=?,title=?,phone=?"
                + " WHERE tid=?";
        
        PreparedStatement ps = DbUtil.executePreparedStatement(sql);
        int result = 0 ;
        try {
            ps.setString(1,t.getTname());
            ps.setString(2,t.getSex());
            ps.setString(3,t.getCardnumber());
            ps.setString(4,t.getPwd());
            ps.setString(5,t.getTitle());
            ps.setString(6,t.getPhone());
            ps.setString(7,t.getTid());
            
            result = ps.executeUpdate();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        DbUtil.close();
        return result;
    }
    
    @Override
    public String searchcardnumber(String account, String password) {
        // TODO Auto-generated method stub
        String sql="select cardnumber from student where sid='"+account+"' and pwd='"+password+"'";
        ResultSet rs = DbUtil.executeQuery(sql);
        String result="null";
        try {
            if(rs.next())
            {
                result=rs.getString(1);
            }
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        DbUtil.close();
        return result;
    }
    
    @Override
    public String searchStime() {
        // TODO Auto-generated method stub
        String sql="select stime from testtime";
        ResultSet rs = DbUtil.executeQuery(sql);
        String result="null";
        try {
            if(rs.next())
            {
                result=rs.getString(1);
            }
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        DbUtil.close();
        return result;
    }

    @Override
    public String searchTime() {
        // TODO Auto-generated method stub
        String sql="select time from testtime";
        ResultSet rs = DbUtil.executeQuery(sql);
        String result="null";
        try {
            if(rs.next())
            {
                result=rs.getString(1);
            }
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        DbUtil.close();
        return result;
    }
    
    @Override
    public List<choicequestion> findchoiceques() {
        // TODO Auto-generated method stub
        String type="0";
        String sql = "SELECT * FROM testpaper where type='"+type+"'ORDER BY nowid";
        List<testpaper> list = new ArrayList<testpaper>();
        ResultSet rs = DbUtil.executeQuery(sql);
        try {
            while(rs.next())
            {
                testpaper tp=new testpaper();
                tp.setPreid(rs.getInt("preid"));
                list.add(tp);
            }
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        DbUtil.close();
        List<choicequestion> list1=new ArrayList<choicequestion>();
        for(int i=0;i<list.size();i++)
        {
            int preid=list.get(i).getPreid();
            String sql1="select * from choicequestion where c_id='"+preid+"'";
            ResultSet rs1 = DbUtil.executeQuery(sql1);
            try {
                while(rs1.next())
                {
                    choicequestion cq=new choicequestion();
                    cq.setC_question(rs1.getString("c_question"));
                    cq.setC_choiceA(rs1.getString("c_choiceA"));
                    cq.setC_choiceB(rs1.getString("c_choiceB"));
                    cq.setC_choiceC(rs1.getString("c_choiceC"));
                    cq.setC_choiceD(rs1.getString("c_choiceD"));
                    cq.setC_answer(rs1.getString("c_answer"));
                    list1.add(cq);
                }
            }catch (SQLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            DbUtil.close();
        }    
        return list1;
    }

    @Override
    public List<fillquestion> findfillques() {
        // TODO Auto-generated method stub
        String type="1";
        String sql = "SELECT * FROM testpaper where type='"+type+"'ORDER BY nowid";
        List list = new ArrayList();
        ResultSet rs = DbUtil.executeQuery(sql);
        try {
            testpaper tp=new testpaper();
            while(rs.next())
            {
                //testpaper tp=new testpaper();
                //tp.setPreid(rs.getInt("preid"));
                list.add(Integer.valueOf(rs.getInt("preid")));
            }
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        DbUtil.close();
        List<fillquestion> list1=new ArrayList<fillquestion>();
        for(int i=0;i<list.size();i++)
        {
            int preid=(int) list.get(i);
            String sql1="select * from fillquestion where f_id='"+preid+"'";
            ResultSet rs1 = DbUtil.executeQuery(sql1);
            try {
                while(rs1.next())
                {
                    fillquestion fq=new fillquestion();
                    fq.setF_question(rs1.getString("f_question"));
                    fq.setF_answer(rs1.getString("f_answer"));
                    list1.add(fq);
                }
            }catch (SQLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            DbUtil.close();
        }    
        return list1;
    }
    
    @Override
    public List<testpaper> findanswer() {
        // TODO Auto-generated method stub
        String sql = "SELECT * FROM testpaper ORDER BY nowid ";
        List<testpaper> list = new ArrayList<testpaper>();
        ResultSet rs = DbUtil.executeQuery(sql);
        try {
            while(rs.next())
            {
                stuscore sscore=new stuscore();
                testpaper tp=new testpaper();
                tp.setAnswer(rs.getString("answer"));
                list.add(tp);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
        DbUtil.close();
        return list;
    }
    
    @Override
    public int searchallpage(String type,String keyword) {
        // TODO Auto-generated method stub
        int length=0;
        String sql=null;
        if(type.equals("0"))
        {
            if(keyword.equals("")||keyword==null)
                sql="select * from choicequestion";
            else
                sql="select * from choicequestion where c_question like '%"+keyword+"%'";
            ResultSet rs= DbUtil.executeQuery(sql);
            List<choicequestion> list = new ArrayList<choicequestion>();
            try {
                while(rs.next())
                {
                    choicequestion cq=new choicequestion();
                    cq.setC_question(rs.getString("c_question"));
                    cq.setC_choiceA(rs.getString("c_choiceA"));
                    cq.setC_choiceB(rs.getString("c_choiceB"));
                    cq.setC_choiceC(rs.getString("c_choiceC"));
                    cq.setC_choiceD(rs.getString("c_choiceD"));
                    list.add(cq);
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
            length=list.size();
            DbUtil.close();
            return length/10+1;
        }
        else
        {
            if(keyword.equals("")||keyword==null)
                sql="select * from fillquestion";
            else
                sql="select * from fillquestion where f_question like '%"+keyword+"%'";
            ResultSet rs= DbUtil.executeQuery(sql);
            List<fillquestion> list = new ArrayList<fillquestion>();
            try {
                while(rs.next())
                {
                    fillquestion fq=new fillquestion();
                    fq.setF_question(rs.getString("f_question"));
                    list.add(fq);
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
            length=list.size();
            DbUtil.close();
            return length/10+1;
        }
        
    }

    
    @Override
    public int savechoiceq(choicequestion c) {
        // TODO Auto-generated method stub
        String sql="INSERT INTO choicequestion(c_question,c_choiceA,c_choiceB,c_choiceC,c_choiceD,c_answer)values(?,?,?,?,?,?)";
        PreparedStatement ps = DbUtil.executePreparedStatement(sql);
        int result = 0 ;
        try {
            ps.setString(1, c.getC_question() );
            ps.setString(2, c.getC_choiceA());
            ps.setString(3, c.getC_choiceB());
            ps.setString(4, c.getC_choiceC());
            ps.setString(5, c.getC_choiceD());
            ps.setString(6, c.getC_answer());
            result = ps.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        DbUtil.close();
        return result; 
    }

    @Override
    public int savefillq(fillquestion f) {
        // TODO Auto-generated method stub
        String sql="INSERT INTO fillquestion(f_question,f_answer)values(?,?)";
        PreparedStatement ps = DbUtil.executePreparedStatement(sql);
        int result = 0 ;
        try {
            ps.setString(1, f.getF_question());
            ps.setString(2, f.getF_answer());
            result = ps.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        DbUtil.close();
        return result; 
    }
    
    @Override
    public int searchallchoice(String keyword) {
        // TODO Auto-generated method stub
        String sql=null;
        if(keyword.equals("")||keyword==null)
            sql="select count(*)totalCount from choicequestion";
        else
            sql="select count(*)totalCount from choicequestion where c_question like '%"+keyword+"%'";
        ResultSet rs= DbUtil.executeQuery(sql);
        int allchoice=0;
        try {
            if(rs.next())
            {
                allchoice=rs.getInt("totalCount");
            }
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return allchoice;
    }

    @Override
    public int searchallfill(String keyword) {
        // TODO Auto-generated method stub
        String sql=null;
        if(keyword.equals("")||keyword==null)
            sql="select count(*)totalCount from fillquestion";
        else
            sql="select count(*)totalCount from fillquestion where f_question like '%"+keyword+"%'";
        ResultSet rs= DbUtil.executeQuery(sql);
        int allfill=0;
        try {
            if(rs.next())
            {
                allfill=rs.getInt("totalCount");
            }
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return allfill;
    }

    
    @Override
    public int savechoice(List a) {
        // TODO Auto-generated method stub
        int result1 = 0 ;
        String sql="select * from choicequestion";
        ResultSet rs = DbUtil.executeQuery(sql);
        List<choicequestion> list = new ArrayList<choicequestion>();
        String result=null; //答案
        int id=0;  //原题id
        try {
            while(rs.next())
            {
                choicequestion cq=new choicequestion();
                cq.setC_id(rs.getInt("c_id"));
                cq.setC_answer(rs.getString("c_answer"));
                list.add(cq);
            }
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        DbUtil.close();
        for(int i=0;i<a.size();i++) {
            int alltitle = searchnowtest();//获取当前试卷的题数
            //查找原题库的对应选择题
            //System.out.println(list.size());
            id=list.get((int) a.get(i)-1).getC_id();
            result=list.get((int) a.get(i)-1).getC_answer();
                
            String sql1="insert into testpaper(nowid,preid,type,answer) values(?,?,0,?)";
            PreparedStatement ps = DbUtil.executePreparedStatement(sql1);
            
            try {
                ps.setInt(1, alltitle+1);
                ps.setInt(2, id);
                ps.setString(3,result);
                result1 = ps.executeUpdate();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        DbUtil.close();
        return result1;
    }

    @Override
    public int savefill(List a) {
        // TODO Auto-generated method stub
        int result1 = 0 ;
        String sql="select * from fillquestion";
        ResultSet rs = DbUtil.executeQuery(sql);
        List<fillquestion> list = new ArrayList<fillquestion>();
        String result=null; //答案
        int id=0;  //原题id
        try {
            while(rs.next())
            {
                fillquestion fq=new fillquestion();
                fq.setF_id(rs.getInt("f_id"));
                fq.setF_answer(rs.getString("f_answer"));
                list.add(fq);
            }
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        DbUtil.close();
        for(int i=0;i<a.size();i++) {
            
            int alltitle = searchnowtest();
            //System.out.println(alltitle);
            id=list.get((int) a.get(i)-1).getF_id();
            result=list.get((int) a.get(i)-1).getF_answer();
            
            String sql1="insert into testpaper(nowid,preid,type,answer) values(?,?,1,?)";
            PreparedStatement ps = DbUtil.executePreparedStatement(sql1);
            try {
                ps.setInt(1, alltitle+1);
                ps.setInt(2, id);
                ps.setString(3,result);
                result1 = ps.executeUpdate();
            } catch (SQLException e) {
                e.printStackTrace();
            }
            DbUtil.close();
        }
        
        return result1;
    }


    @Override
    public int searchnowtest() {
        // TODO Auto-generated method stub
        String sql="select count(*)totalCount from testpaper";
        ResultSet rs= DbUtil.executeQuery(sql);
        int alltitle=0;
        try {
            if(rs.next())
            {
                alltitle=rs.getInt("totalCount");
            }
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        DbUtil.close();
        return alltitle;
    }
    
    @Override
    public int deletechoice(int id) {
        // TODO Auto-generated method stub
        String sql="delete from choicequestion where c_id='"+id+"'";
        int result = 0 ;
        result = DbUtil.executeUpdate(sql);
        DbUtil.close();
        return result;
    }

    @Override
    public int deletefill(int id) {
        // TODO Auto-generated method stub
        String sql="delete from fillquestion where f_id='"+id+"'";
        int result=0;
        result=DbUtil.executeUpdate(sql);
        DbUtil.close();
        return result;
    }
    
    @Override
    public int updatechoice(choicequestion c) {
        // TODO Auto-generated method stub
        String sql="update choicequestion set c_question=?,c_choiceA=?,"
                +"c_choiceB=?,c_choiceC=?,c_choiceD=?,c_answer=? where c_id=?";
        PreparedStatement ps=DbUtil.executePreparedStatement(sql);
        int result=0;
        try {
            
            ps.setString(1, c.getC_question());
            ps.setString(2, c.getC_choiceA());
            ps.setString(3, c.getC_choiceB());
            ps.setString(4, c.getC_choiceC());
            ps.setString(5, c.getC_choiceD());
            ps.setString(6, c.getC_answer());
            ps.setInt(7, c.getC_id());
            result = ps.executeUpdate();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        DbUtil.close();
        return result;
    }

    @Override
    public int updatefill(fillquestion f) {
        // TODO Auto-generated method stub
        String sql="update fillquestion set f_question=?,f_answer=? where f_id=?";
        PreparedStatement ps=DbUtil.executePreparedStatement(sql);
        int result=0;
        try {
            
            ps.setString(1, f.getF_question());
            ps.setString(2, f.getF_answer());
            ps.setInt(3, f.getF_id());
            result = ps.executeUpdate();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        DbUtil.close();
        return result;
    }
    
    @Override
    public List findtitle(int page,String type,String keyword) {
        // TODO Auto-generated method stub
        int spage=(page-1)*10; //当前页开始的记录数
        String sql=null;
        if(type.equals("0"))
        {
            if(keyword.equals("")||keyword==null)
                sql="select * from choicequestion limit "+spage+",10";
            else
                sql="select * from choicequestion where c_question like '%"+keyword+"%' limit "+spage+",10";
            
                List<choicequestion> list = new ArrayList<choicequestion>();
                ResultSet rs = DbUtil.executeQuery(sql);
                try {
                    while(rs.next())
                    {
                    choicequestion cq=new choicequestion();
                    cq.setC_id(rs.getInt("c_id"));
                    cq.setC_question(rs.getString("c_question"));
                    cq.setC_choiceA(rs.getString("c_choiceA"));
                    cq.setC_choiceB(rs.getString("c_choiceB"));
                    cq.setC_choiceC(rs.getString("c_choiceC"));
                    cq.setC_choiceD(rs.getString("c_choiceD"));
                    cq.setC_answer(rs.getString("c_answer"));
                    list.add(cq);
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
            DbUtil.close();
            return list;
        }
        else
        {
            if(keyword.equals("")||keyword==null)
                sql="select * from fillquestion limit "+spage+",10";
            else
                sql="select * from fillquestion where f_question like '%"+keyword+"%' limit "+spage+",10";
            List<fillquestion> list = new ArrayList<fillquestion>();
            ResultSet rs = DbUtil.executeQuery(sql);
            try {
                while(rs.next())
                {
                    fillquestion fq=new fillquestion();
                    fq.setF_id(rs.getInt("f_id"));
                    fq.setF_question(rs.getString("f_question"));
                    fq.setF_answer(rs.getString("f_answer"));
                    list.add(fq);
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
            DbUtil.close();
            return list;
        }
        
    }

    @Override
    public int deletetestpaper() {
        // TODO Auto-generated method stub
        String sql="delete from testpaper";
        int result=0;
        result=DbUtil.executeUpdate(sql);
        DbUtil.close();
        return result;
    }
    
    @Override
    public int savetime(String stime,String time) {
        // TODO Auto-generated method stub
        String sql="insert into testtime(stime,time) values(?,?)";
        PreparedStatement ps = DbUtil.executePreparedStatement(sql);
        int result = 0 ;
        try {
            ps.setString(1, stime);
            ps.setString(2, time);
            result = ps.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        DbUtil.close();
        return result;
    }

    @Override
    public int deletetime() {
        // TODO Auto-generated method stub
        String sql="delete from testtime";
        int result=0;
        result=DbUtil.executeUpdate(sql);
        DbUtil.close();
        return result;
    }

    @Override
    public List<stuscore> findscore() {
        // TODO Auto-generated method stub
        String sql = "SELECT * FROM stuscore ORDER BY sid ";
        List<stuscore> list = new ArrayList<stuscore>();
        ResultSet rs = DbUtil.executeQuery(sql);
        try {
            while(rs.next())
            {
                stuscore sscore=new stuscore();
                sscore.setSid(rs.getString("sid"));
                sscore.setScore(rs.getString("score"));
                list.add(sscore);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
        DbUtil.close();
        List<stuscore> list1 =new ArrayList<stuscore>();
        for(int i=0;i<list.size();i++)
        {
            String sql1="select sname from student where sid='"+list.get(i).getSid()+"'";
            ResultSet rs1 = DbUtil.executeQuery(sql1);
            try {
                if(rs1.next())
                {
                    stuscore score=new stuscore();
                    score.setSid(list.get(i).getSid());
                    score.setSname(rs1.getString(1));
                    score.setScore(list.get(i).getScore());
                    list1.add(score);
                }
            } catch (SQLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        DbUtil.close();
        return list1;
    }
    
    @Override
    public int existtime() {
        // TODO Auto-generated method stub
        String sql="select count(*)totalCount from testtime";
        ResultSet rs= DbUtil.executeQuery(sql);
        int time=0;
        try {
            if(rs.next())
            {
                time=rs.getInt("totalCount");
            }
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        DbUtil.close();
        return time;
    }

    @Override
    public int existscore() {
        // TODO Auto-generated method stub
        String sql="select count(*)totalCount from stuscore";
        ResultSet rs= DbUtil.executeQuery(sql);
        int score=0;
        try {
            if(rs.next())
            {
                score=rs.getInt("totalCount");
            }
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        DbUtil.close();
        return score;
    }
    
    @Override
    public int deletescore() {
        // TODO Auto-generated method stub
        String sql="delete from stuscore";
        int result=0;
        result=DbUtil.executeUpdate(sql);
        DbUtil.close();
        return result;
    }
    
    @Override
    public List<student> searchstudent(String keyword, String select,int page) {
        // TODO Auto-generated method stub
        int spage=(page-1)*10;
        String sql=null;
        List<student> list = new ArrayList<student>();
        if(keyword==null || keyword == "")
        {
            sql="select * from student limit "+spage+",10";
            ResultSet rs = DbUtil.executeQuery(sql);
            try {
                while(rs.next())
                {
                    student s=new student();
                    s.setSid(rs.getString("sid"));
                    s.setSname(rs.getString("sname"));
                    s.setSex(rs.getString("sex"));
                    s.setCardnumber(rs.getString("cardnumber"));
                    s.setPwd(rs.getString("pwd"));
                    s.setDepartment(rs.getString("department"));
                    s.setPhone(rs.getString("phone"));
                    list.add(s);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
            DbUtil.close();
            return list;
        }
        else 
        {
            if(select.equals("id")) 
                sql="select * from student where sid='"+keyword+"' limit "+spage+",10";
            else
                sql="select * from student where sname='"+keyword+"' limit "+spage+",10";
            ResultSet rs = DbUtil.executeQuery(sql);
            try {
                while(rs.next())
                {
                    student s=new student();
                    s.setSid(rs.getString("sid"));
                    s.setSname(rs.getString("sname"));
                    s.setSex(rs.getString("sex"));
                    s.setCardnumber(rs.getString("cardnumber"));
                    s.setPwd(rs.getString("pwd"));
                    s.setDepartment(rs.getString("department"));
                    s.setPhone(rs.getString("phone"));
                    list.add(s);
                }
            } catch (SQLException e) {
            e.printStackTrace();
            }
                DbUtil.close();
                return list;        
        }
    }


    @Override
    public List<teacher> searchteacher(String keyword, String select,int page) {
        // TODO Auto-generated method stub
        int spage=(page-1)*10;
        String sql=null;
        List<teacher> list = new ArrayList<teacher>();
        if(keyword==null || keyword == "")
        {
            sql="select * from teacher limit "+spage+",10";
            ResultSet rs = DbUtil.executeQuery(sql);
            try {
                while(rs.next())
                {
                    teacher t=new teacher();
                    t.setTid(rs.getString("tid"));
                    t.setTname(rs.getString("tname"));
                    t.setSex(rs.getString("sex"));
                    t.setCardnumber(rs.getString("cardnumber"));
                    t.setPwd(rs.getString("pwd"));
                    t.setTitle(rs.getString("title"));
                    t.setPhone(rs.getString("phone"));
                    list.add(t);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
            DbUtil.close();
            return list;
        }
        else 
        {
            if(select.equals("id"))
                sql="select * from teacher where tid='"+keyword+"' limit "+spage+",10";
            else
                sql="select * from teacher where tname='"+keyword+"' limit "+spage+",10";
            ResultSet rs = DbUtil.executeQuery(sql);
            try {
                while(rs.next())
                {
                    teacher t=new teacher();
                    t.setTid(rs.getString("tid"));
                    t.setTname(rs.getString("tname"));
                    t.setSex(rs.getString("sex"));
                    t.setCardnumber(rs.getString("cardnumber"));
                    t.setPwd(rs.getString("pwd"));
                    t.setTitle(rs.getString("title"));
                    t.setPhone(rs.getString("phone"));
                    list.add(t);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
            DbUtil.close();
            return list;    
    }
    }

    @Override
    public int searchstuallpage(String keyword,String select) {
        // TODO Auto-generated method stub
        String sql=null;
        int allstu=0;
        if(keyword==null || keyword == "")
            sql="select count(*)totalCount from student";
        else 
        {    if(select.equals("id"))
            sql="select count(*)totalCount from student where sid='"+keyword+"'";
            else 
            sql="select count(*)totalCount from student where sname='"+keyword+"'";
        }
        ResultSet rs= DbUtil.executeQuery(sql);
        try {
            if(rs.next())
            {
                allstu=rs.getInt("totalCount");
            }
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        DbUtil.close();
        return allstu/10+1;
    }

    @Override
    public int searchteaallpage(String keyword,String select) {
        // TODO Auto-generated method stub
        String sql=null;
        int alltea=0;
        if(keyword==null || keyword == "")
            sql="select count(*)totalCount from teacher";
        else 
        {     if(select.equals("id"))
                sql="select count(*)totalCount from teacher where tid='"+keyword+"'";
            else
                sql="select count(*)totalCount from teacher where tname='"+keyword+"'";
        }
        ResultSet rs= DbUtil.executeQuery(sql);
        try {
            if(rs.next())
            {
                alltea=rs.getInt("totalCount");
            }
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        DbUtil.close();
        return alltea/10+1;
    }

    @Override
    public int findstu(String keyword,String select) {
        // TODO Auto-generated method stub
        String sql=null;
        int allstu=0;
        if(keyword==null || keyword == "")
            sql="select count(*)totalCount from student";
        else 
        {    if(select.equals("id"))
            sql="select count(*)totalCount from student where sid='"+keyword+"'";
            else 
            sql="select count(*)totalCount from student where sname='"+keyword+"'";
        }
        ResultSet rs= DbUtil.executeQuery(sql);
        try {
            if(rs.next())
            {
                allstu=rs.getInt("totalCount");
            }
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        DbUtil.close();
        return allstu;
    }

    @Override
    public int findtea(String keyword,String select) {
        // TODO Auto-generated method stub
        String sql=null;
        int alltea=0;
        if(keyword==null || keyword == "")
            sql="select count(*)totalCount from teacher";
        else 
        {     if(select.equals("id"))
                sql="select count(*)totalCount from teacher where tid='"+keyword+"'";
            else
                sql="select count(*)totalCount from teacher where tname='"+keyword+"'";
        }
        ResultSet rs= DbUtil.executeQuery(sql);
        try {
            if(rs.next())
            {
                alltea=rs.getInt("totalCount");
            }
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        DbUtil.close();
        return alltea;
    }
    
    @Override
    public int deletestudent(String id) {
        // TODO Auto-generated method stub
        String sql="delete from student where sid='"+id+"'";
        int result=0;
        result=DbUtil.executeUpdate(sql);
        DbUtil.close();
        return result;
    }

    @Override
    public int deleteteacher(String id) {
        // TODO Auto-generated method stub
        String sql="delete from teacher where tid='"+id+"'";
        int result=0;
        result=DbUtil.executeUpdate(sql);
        DbUtil.close();
        return result;
    }

}

TestDaoImpl

3.服务于dao的简单工厂

package org.exam.dao.factory;

import org.exam.dao.TestDAO;
import org.exam.dao.impl.testdaoimpl;

public class DaoFactory {
    public static TestDAO gettestdao() 
    {
        return new testdaoimpl();
    }
}

DAOFactory

4.数据bean（实体类）

package org.exam.databean;

public class adminstrator {
    private String adid;
    private String aname;
    private String sex;
    private String cardnumber;
    private String pwd;
    private String phone;
    public String getAdid() {
        return adid;
    }
    public void setAdid(String adid) {
        this.adid = adid;
    }
    public String getAname() {
        return aname;
    }
    public void setAname(String aname) {
        this.aname = aname;
    }
    public String getSex() {
        return sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }
    public String getCardnumber() {
        return cardnumber;
    }
    public void setCardnumber(String cardnumber) {
        this.cardnumber = cardnumber;
    }
    public String getPwd() {
        return pwd;
    }
    public void setPwd(String pwd) {
        this.pwd = pwd;
    }
    public String getPhone() {
        return phone;
    }
    public void setPhone(String phone) {
        this.phone = phone;
    }
    
}

AdminStrator

package org.exam.databean;

public class choicequestion {

    private int c_id;
    private String c_question;
    private String c_choiceA;
    private String c_choiceB;
    private String c_choiceC;
    private String c_choiceD;
    private String c_answer;
    
    public int getC_id() {
        return c_id;
    }
    public void setC_id(int c_id) {
        this.c_id = c_id;
    }
    public String getC_question() {
        return c_question;
    }
    public void setC_question(String c_question) {
        this.c_question = c_question;
    }
    public String getC_choiceA() {
        return c_choiceA;
    }
    public void setC_choiceA(String c_choiceA) {
        this.c_choiceA = c_choiceA;
    }
    public String getC_choiceB() {
        return c_choiceB;
    }
    public void setC_choiceB(String c_choiceB) {
        this.c_choiceB = c_choiceB;
    }
    public String getC_choiceC() {
        return c_choiceC;
    }
    public void setC_choiceC(String c_choiceC) {
        this.c_choiceC = c_choiceC;
    }
    public String getC_choiceD() {
        return c_choiceD;
    }
    public void setC_choiceD(String c_choiceD) {
        this.c_choiceD = c_choiceD;
    }
    public String getC_answer() {
        return c_answer;
    }
    public void setC_answer(String c_answer) {
        this.c_answer = c_answer;
    }

}

ChoiceQuestion

package org.exam.databean;

public class fillquestion {

    private int f_id;
    private String f_question;
    private String f_answer;
    
    public int getF_id() {
        return f_id;
    }
    public void setF_id(int f_id) {
        this.f_id = f_id;
    }
    public String getF_question() {
        return f_question;
    }
    public void setF_question(String f_question) {
        this.f_question = f_question;
    }
    public String getF_answer() {
        return f_answer;
    }
    public void setF_answer(String f_answer) {
        this.f_answer = f_answer;
    }
}

FillQuestion

package org.exam.databean;

public class student {
    private String sid;
    private String sname;
    private String sex;
    private String cardnumber;
    private String pwd;
    private String department;
    private String phone;
    public String getSid() {
        return sid;
    }
    public void setSid(String sid) {
        this.sid = sid;
    }
    public String getSname() {
        return sname;
    }
    public void setSname(String sname) {
        this.sname = sname;
    }
    public String getSex() {
        return sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }
    public String getCardnumber() {
        return cardnumber;
    }
    public void setCardnumber(String cardnumber) {
        this.cardnumber = cardnumber;
    }
    public String getPwd() {
        return pwd;
    }
    public void setPwd(String pwd) {
        this.pwd = pwd;
    }
    public String getDepartment() {
        return department;
    }
    public void setDepartment(String department) {
        this.department = department;
    }
    public String getPhone() {
        return phone;
    }
    public void setPhone(String phone) {
        this.phone = phone;
    }
    
}

Student

package org.exam.databean;

public class teacher {
    private String tid;
    private String tname;
    private String sex;
    private String cardnumber;
    private String pwd;
    private String title;
    private String phone;
    public String getTid() {
        return tid;
    }
    public void setTid(String tid) {
        this.tid = tid;
    }
    public String getTname() {
        return tname;
    }
    public void setTname(String tname) {
        this.tname = tname;
    }
    public String getSex() {
        return sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }
    public String getCardnumber() {
        return cardnumber;
    }
    public void setCardnumber(String cardnumber) {
        this.cardnumber = cardnumber;
    }
    public String getPwd() {
        return pwd;
    }
    public void setPwd(String pwd) {
        this.pwd = pwd;
    }
    public String getTitle() {
        return title;
    }
    public void setTitle(String title) {
        this.title = title;
    }
    public String getPhone() {
        return phone;
    }
    public void setPhone(String phone) {
        this.phone = phone;
    }
    
}

Teacher

package org.exam.databean;

public class stuscore {
    private String sid;
    private String score;
    private String sname;
    public String getSname() {
        return sname;
    }
    public void setSname(String sname) {
        this.sname = sname;
    }
    public String getSid() {
        return sid;
    }
    public void setSid(String sid) {
        this.sid = sid;
    }
    public String getScore() {
        return score;
    }
    public void setScore(String score) {
        this.score = score;
    }
    
}

StuScore

package org.exam.databean;

public class test {
    private String name;
    private String password;
    
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    
}

Test

package org.exam.databean;

public class testpaper {

    private int nowid;
    private int preid;
    private String type;
    private String answer;
    public int getNowid() {
        return nowid;
    }
    public void setNowid(int nowid) {
        this.nowid = nowid;
    }
    public int getPreid() {
        return preid;
    }
    public void setPreid(int preid) {
        this.preid = preid;
    }
    public String getType() {
        return type;
    }
    public void setType(String type) {
        this.type = type;
    }
    public String getAnswer() {
        return answer;
    }
    public void setAnswer(String answer) {
        this.answer = answer;
    }

}

TestPaper

5.

 servlet实现类

package org.exam.servlet;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.exam.dao.TestDAO;
import org.exam.dao.factory.DaoFactory;
import org.exam.databean.student;
import org.exam.databean.teacher;

/**
 * Servlet implementation class AddUser
 */
@WebServlet("/AddUser")
public class AddUser extends HttpServlet {
    private static final long serialVersionUID = 1L;
       

    public AddUser() {
        super();
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("UTF-8");
        String Result="0";
        int result=0;
        String type = request.getParameter("type");
        TestDAO tdao = DaoFactory.gettestdao();
        if(type.equals("teacher")) {
            teacher    user = new teacher();
            user.setTid(request.getParameter("id"));
            user.setTname(request.getParameter("name"));
            user.setSex(request.getParameter("sex"));
            user.setCardnumber(request.getParameter("IDcard"));
            user.setPhone(request.getParameter("phone"));
            user.setTitle(request.getParameter("title"));
            user.setPwd("12345");
            
            result=tdao.saveteacher(user);
        }else if(type.equals("student")) {
            student    user = new student();
            user.setSid(request.getParameter("id"));
            user.setSname(request.getParameter("name"));
            user.setSex(request.getParameter("sex"));
            user.setCardnumber(request.getParameter("IDcard"));
            user.setPhone(request.getParameter("phone"));
            user.setDepartment(request.getParameter("title"));
            user.setPwd("12345");
            
            result=tdao.savestudent(user);
        }
        
        if(result!=0){
            Result="OK";
        }else
            Result="NO";

        request.getRequestDispatcher("./jsp/addUser.jsp?Result="+Result).forward(request, response);
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }

}

AddUser

package org.exam.servlet;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.exam.dao.TestDAO;
import org.exam.dao.factory.DaoFactory;

@WebServlet("/DeleteServlet")
public class DeleteServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    public DeleteServlet() {
        super();
    }
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("UTF-8");
        int id = Integer.valueOf(request.getParameter("id"));
        int page = Integer.valueOf(request.getParameter("page"));
        String type =  request.getParameter("type");
        String key =  request.getParameter("key");
        TestDAO tdao = DaoFactory.gettestdao();
        int result = 0;
        if (type.equals("Choice")) {
            result = tdao.deletechoice(id);
        } else 
            result = tdao.deletefill(id);
        //response.sendRedirect("./TestManage?page=" + page + "&type=" + type + "&key=" + key);
        request.getRequestDispatcher("./TestManage?page=" + page + "&type=" + type + "&key=" + key).forward(request, response);
        
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }

}

DeleteServlet

package org.exam.servlet;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.exam.dao.TestDAO;
import org.exam.dao.factory.DaoFactory;

@WebServlet("/DeleteUser")
public class DeleteUser extends HttpServlet {
    private static final long serialVersionUID = 1L;
    public DeleteUser() {
        super();
    }
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("UTF-8");
        String type = request.getParameter("type");
        int page = Integer.valueOf(request.getParameter("page"));
        String key = request.getParameter("key");
        String selectStyle = request.getParameter("selectStyle");
        String id = request.getParameter("id");
        TestDAO tdao = DaoFactory.gettestdao();
        if (type.equals("Teacher")) {
            tdao.deleteteacher(id);
        } else {
            tdao.deletestudent(id);
        }
        request.getRequestDispatcher("./ShowUserInfo?page=" + page + "&type=" + type + "&key=" + key + "&selectStyle=" + selectStyle).forward(request, response);
    }
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        doGet(request, response);
    }

}

DeleteUser

package org.exam.servlet;

import java.io.IOException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.exam.dao.TestDAO;
import org.exam.dao.factory.DaoFactory;
import org.exam.databean.choicequestion;
import org.exam.databean.fillquestion;

@WebServlet("/EnterTest")
public class EnterTest extends HttpServlet {
    private static final long serialVersionUID = 1L;
    public EnterTest() {
        super();
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("UTF-8");
        TestDAO tdao = DaoFactory.gettestdao();    
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String startTime = tdao.searchStime();
        if (startTime.equals("null")) {
            System.out.println("ERROR.Don't set the test time");
            return;
        }
        try {
            Date stime = sdf.parse(startTime);
            int testMinute = Integer.parseInt(tdao.searchTime());
            Date ntime = new Date();
            Calendar rightNow = Calendar.getInstance();
            rightNow.setTime(stime);
            rightNow.add(Calendar.MINUTE,testMinute);
            Date sTime = rightNow.getTime(); //考试结束时间    
                    
            if (ntime.before(sTime)) {
                List<choicequestion> list1 = tdao.findchoiceques();
                StringBuffer sb = new StringBuffer();
                for (int i = 1; i <= list1.size(); i++) {                    
                    if (i == 1)
                        sb.append("<div class=\"con\" style=\"display: block;\">");
                    else if (i % 5 == 1) {
                        sb.append("<div class=\"con\" style=\"display: none;\">");
                    }
                    sb.append("<div class=\"t\"><div class=\"title\"><label>" + i + ".");
                    sb.append(list1.get(i - 1).getC_question());
                    sb.append("</label></div>");
                    sb.append("<div class=\"answer\"><label><input name=\"t" + i + "\" type=\"radio\" value=\"A\" />");
                    sb.append(list1.get(i - 1).getC_choiceA());
                    sb.append("</label>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<label><input name=\"t" + i + "\" type=\"radio\" value=\"B\" />");
                    sb.append(list1.get(i - 1).getC_choiceB());
                    sb.append("</label>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<label><input name=\"t" + i + "\" type=\"radio\" value=\"C\" />");
                    sb.append(list1.get(i - 1).getC_choiceC());
                    sb.append("</label>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<label><input name=\"t" + i + "\" type=\"radio\" value=\"D\" />");
                    sb.append(list1.get(i - 1).getC_choiceD());
                    sb.append("</label></div></div>");
                    if (i % 5 == 0) {
                        sb.append("</div>");
                    }
                }
                List<fillquestion> list2 = tdao.findfillques();
                for (int i = 51; i <= list2.size() + 50; i++) {
                    if (i % 5 == 1) {
                        sb.append("<div class=\"con\" style=\"display: none;\">");
                    }
                    sb.append("<div class=\"t\"><div class=\"title\"><label>题目" + i + "：");
                    sb.append(list2.get(i - 51).getF_question());
                    sb.append("</label></div>");
                    sb.append("<div class=\"answer\"><label><input name=\"t" + i + "\" type=\"text\" value=\"\"/> </label></div></div>");
                    if (i % 5 == 0) {
                        sb.append("</div>");
                    }
                }
                //System.out.println(sb);
                request.setAttribute("sb", sb);
                //考试结束时间
                SimpleDateFormat df = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
                String endTime;
                endTime = df.format(sTime);
                HttpSession session = request.getSession();
                session.setAttribute("endTime", endTime);
                
                request.getRequestDispatcher("./jsp/stuTest.jsp").forward(request, response);
                //response.sendRedirect("./jsp/stuTest.jsp");
            } else {
                request.setAttribute("overTest", "over");
                request.getRequestDispatcher("./jsp/stuMenu.jsp").forward(request, response);
                System.out.println("考试时间已过");        
            }                
            
        } catch (ParseException e) {
            e.printStackTrace();
        }        
        //response.sendRedirect("./jsp/stuTest.jsp");
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }

}

EnterTest

package org.exam.servlet;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.exam.dao.TestDAO;
import org.exam.dao.factory.DaoFactory;
import org.exam.databean.choicequestion;
import org.exam.databean.fillquestion;

@WebServlet("/FormTest")
public class FormTest extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    public FormTest() {
        super();
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("utf-8");
        String dateTime = request.getParameter("Datetime");
        String timeLimit = request.getParameter("Timelimit");
        TestDAO tdao = DaoFactory.gettestdao(); 
        //清空试卷表、时间表、成绩表
        tdao.deletetestpaper();
        tdao.deletetime();
        tdao.deletescore();
        
        tdao.savetime(dateTime, timeLimit);
        List list = new ArrayList();
        Random r = new Random();
        int nums = 50;
        int end = tdao.searchallchoice("");
        int start = 1;
        int num = 1;
        while (list.size() != nums) {
            num = r.nextInt(end-start) + start;
            if(!list.contains(num)){
                list.add(num);
            }
        }
        //生成选择题
        tdao.savechoice(list);
        
        list.clear();
        end = tdao.searchallfill("");
        while (list.size() != nums) {
            num = r.nextInt(end-start) + start;
            if(!list.contains(num)){
                list.add(num);
            }
        }
        //生成填空题
        tdao.savefill(list);

        request.getRequestDispatcher("./ShowTest").forward(request, response);
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        doGet(request, response);
    }

}

FormTest

package org.exam.servlet;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.exam.dao.TestDAO;
import org.exam.dao.factory.DaoFactory;
import org.exam.databean.choicequestion;
import org.exam.databean.fillquestion;

@WebServlet("/FormTest")
public class FormTest extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    public FormTest() {
        super();
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("utf-8");
        String dateTime = request.getParameter("Datetime");
        String timeLimit = request.getParameter("Timelimit");
        TestDAO tdao = DaoFactory.gettestdao(); 
        //清空试卷表、时间表、成绩表
        tdao.deletetestpaper();
        tdao.deletetime();
        tdao.deletescore();
        
        tdao.savetime(dateTime, timeLimit);
        List list = new ArrayList();
        Random r = new Random();
        int nums = 50;
        int end = tdao.searchallchoice("");
        int start = 1;
        int num = 1;
        while (list.size() != nums) {
            num = r.nextInt(end-start) + start;
            if(!list.contains(num)){
                list.add(num);
            }
        }
        //生成选择题
        tdao.savechoice(list);
        
        list.clear();
        end = tdao.searchallfill("");
        while (list.size() != nums) {
            num = r.nextInt(end-start) + start;
            if(!list.contains(num)){
                list.add(num);
            }
        }
        //生成填空题
        tdao.savefill(list);

        request.getRequestDispatcher("./ShowTest").forward(request, response);
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        doGet(request, response);
    }

}

LoginServlet

package org.exam.servlet;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;

import org.exam.dao.TestDAO;
import org.exam.dao.factory.DaoFactory;
import org.exam.databean.choicequestion;
import org.exam.databean.fillquestion;

public class ReadFile {

    private String fileName;
    public ReadFile(String fileName) {
        this.fileName = fileName;
    }
    //打开选择题文件并存入数据库
    public int readChoiceFile() throws IOException {
        int result = 0;
        //System.out.println(fileName);
        //File f=new File("C:\\Users\\ZC\\eclipse-workspace\\.metadata\\.plugins\\org.eclipse.wst.server.core\\tmp1\\wtpwebapps\\examOnline\\upload\\" + fileName);
        File f = new File("D:\\" + fileName);
        FileInputStream in;  
        in = new FileInputStream(f);  
        BufferedReader br=new BufferedReader(new InputStreamReader(in,"GBK"));                
        String line=null;  
        br.mark((int) f.length());
        while(!(line=br.readLine()).equals("答案")) {
            ;
        }
        line = br.readLine();
        String[] answer=line.trim().split(" +");
        //for (int i = 0; i < answer.length; i++)
        //    System.out.println(answer[i]);
        
        br.reset();
        choicequestion cq = new choicequestion();
        int flag = 1;
        int i = 0;
        while(!(line=br.readLine()).equals("答案")) {
            //System.out.println(line);
            if (flag % 2 == 1) {
                line = line.substring(2, line.length());
                cq.setC_question(line.trim());
            } else {
                String[] choice = line.trim().split("\\s\\s+");
                cq.setC_choiceA(choice[0].trim());
                cq.setC_choiceB(choice[1].trim());
                cq.setC_choiceC(choice[2].trim());
                cq.setC_choiceD(choice[3].trim());
                cq.setC_answer(answer[i++].trim());
                /*System.out.println(cq.getC_question());
                System.out.println(cq.getC_choiceA());
                System.out.println(cq.getC_choiceD());
                System.out.println(cq.getC_answer());*/
                TestDAO tdao = DaoFactory.gettestdao();
                result = tdao.savechoiceq(cq);
            }
            flag++;            
        }
        br.close();  
        in.close();    
        return result;
    }
    //打开填空题文件并存入数据库
    public int readFillFile() throws IOException {
        int result = 0;
        //File f=new File("C:\\Users\\ZC\\eclipse-workspace\\.metadata\\.plugins\\org.eclipse.wst.server.core\\tmp1\\wtpwebapps\\examOnline\\upload\\" + fileName);
        File f = new File("D:\\" + fileName);
        FileInputStream in;  
        in = new FileInputStream(f);  
        BufferedReader br=new BufferedReader(new InputStreamReader(in,"GBK"));                
        String line=null;  
        fillquestion fq = new fillquestion();
        int flag = 1;
        while((line=br.readLine()) != null) {
            //System.out.println(line);
            if (flag % 2 == 1) {
                line = line.substring(2, line.length());
                fq.setF_question(line.trim());
            } else {
                fq.setF_answer(line.trim());
                //System.out.println(fq.getF_question());
                //System.out.println(fq.getF_answer());

                TestDAO tdao = DaoFactory.gettestdao();
                result = tdao.savefillq(fq);
            }
            flag++;            
        }
        br.close();  
        in.close();    
        return result;
    }
}

ReadFile

package org.exam.servlet;

import java.io.IOException;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.exam.dao.TestDAO;
import org.exam.dao.factory.DaoFactory;
import org.exam.databean.stuscore;

@WebServlet("/ShowScore")
public class ShowScore extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    public ShowScore() {
        super();
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("UTF-8");
        TestDAO tdao = DaoFactory.gettestdao();
        if (tdao.existscore() != 0) {
            List<stuscore> list = tdao.findscore();
            StringBuffer sb = new StringBuffer();
            for (int i = 0; i < list.size(); i++) {
                sb.append("<tr><td>");
                sb.append(list.get(i).getSid());
                sb.append("</td><td>");
                sb.append(list.get(i).getSname());
                sb.append("</td><td>");
                sb.append(list.get(i).getScore());
                sb.append("</td></tr>");
            }
            request.setAttribute("score", sb);
            //System.out.println(sb);
        } else {
            request.setAttribute("noScore", "noScore");
        }
        request.getRequestDispatcher("./jsp/showScore.jsp").forward(request, response);
    }
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        doGet(request, response);
    }

}

ShowScore

package org.exam.servlet;

import java.io.IOException;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.exam.dao.TestDAO;
import org.exam.dao.factory.DaoFactory;
import org.exam.databean.choicequestion;
import org.exam.databean.fillquestion;

@WebServlet("/ShowTest")
public class ShowTest extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    public ShowTest() {
        super();
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("utf-8");
        TestDAO tdao = DaoFactory.gettestdao(); 
        if (tdao.existtime() != 0) {
            StringBuffer sb = new StringBuffer();
            List<choicequestion> list1 = tdao.findchoiceques();
            sb.append("<div class=\"t\"><div class=\"title\"><span>考试开始时间：");
            String time = tdao.searchStime();
            time = time.substring(0, time.length() - 2);
            sb.append(time);
            sb.append("&nbsp;&nbsp;&nbsp;考试时长：");
            sb.append(tdao.searchTime());
            sb.append("分钟</span></div></div>");
            
            for (int i = 0; i < list1.size(); i++) {
                sb.append("<div class=\"t\"><div class=\"title\"><span>");
                sb.append(i + 1 + ".");
                sb.append(list1.get(i).getC_question());
                sb.append("</span></div><div class=\"choice\"><div><span>");
                sb.append(list1.get(i).getC_choiceA());
                sb.append("</span></div><div><span>");
                sb.append(list1.get(i).getC_choiceB());
                sb.append("</span></div><div><span>");
                sb.append(list1.get(i).getC_choiceC());
                sb.append("</span></div><div><span>");
                sb.append(list1.get(i).getC_choiceD());
                sb.append("</span></div></div><div class=\"answer\"><span>答案：");
                sb.append(list1.get(i).getC_answer());
                sb.append("</span></div></div>");
            }
            
            List<fillquestion> list2 = tdao.findfillques();
            for (int i = 0; i < list2.size(); i++) {
                sb.append("<div class=\"t\"><div class=\"title\"><span>");
                sb.append(i + 1 + list1.size() + ".");
                sb.append(list2.get(i).getF_question());
                sb.append("</span></div><div class=\"answer\"><span>答案：");
                sb.append(list2.get(i).getF_answer());
                //System.out.println(list2.get(i).getF_answer());
                sb.append("</span></div></div>");
            }
            request.setAttribute("testInfo", sb);
        } else {
            request.setAttribute("noTest", "noTest");
        }    
        request.getRequestDispatcher("./jsp/testView.jsp").forward(request, response);
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        doGet(request, response);
    }

}

ShowTest

package org.exam.servlet;

import java.io.IOException;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.exam.dao.TestDAO;
import org.exam.dao.factory.DaoFactory;
import org.exam.databean.student;
import org.exam.databean.teacher;

@WebServlet("/ShowUserInfo")
public class ShowUserInfo extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    public ShowUserInfo() {
        super();
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("UTF-8");
        int page = Integer.valueOf(request.getParameter("page"));
        String type = request.getParameter("type");
        String key = request.getParameter("key");
        String selectStyle = request.getParameter("selectStyle");
        request.setAttribute("type", type);
        request.setAttribute("key", key);
        request.setAttribute("page", page);
        request.setAttribute("selectStyle", selectStyle);
        TestDAO tdao = DaoFactory.gettestdao();
        StringBuffer sb = new StringBuffer();
        if (type.equals("Teacher")) {
            sb.append("<table class=\"table table-hover table-bordered\">");
            sb.append("<caption><span id=\"titleChange\">教师用户信息</span></caption>");
            sb.append("<thead><tr><th>教工号</th><th>姓名</th><th>性别</th><th>身份证号</th>");
            sb.append("<th>职称</th><th>密码</th><th>电话号码</th><th>操作</th></tr></thead>");

            List<teacher> list = tdao.searchteacher(key, selectStyle, page);
            for (int i = 0; i < list.size(); i++) {
                sb.append("<tr><td>");
                sb.append(list.get(i).getTid());
                sb.append("</td><td>");
                sb.append(list.get(i).getTname());
                sb.append("</td><td>");
                sb.append(list.get(i).getSex());
                sb.append("</td><td>");
                sb.append(list.get(i).getCardnumber());
                sb.append("</td><td>");
                sb.append(list.get(i).getTitle());
                sb.append("</td><td>");
                sb.append(list.get(i).getPwd());
                sb.append("</td><td>");
                sb.append(list.get(i).getPhone());
                sb.append("</td><td>");
                sb.append("<form action=\"DeleteUser?type=" + type + "&id=" + list.get(i).getTid() + "&page=" + page + "&key=" + key + "&selectStyle=" + selectStyle + "\" method=\"post\" onsubmit=\"return checkDelete()\">");
                sb.append("<button class=\"btn btn-primary\" data-toggle=\"modal\" data-target=\"#myModal1\" type=\"button\" onclick=\"editTest(this)\">修改</button>");
                sb.append("<button class=\"btn btn-primary\" type=\"submit\">删除</button></form></td></tr>");
            }
            //总页数
            int pages = tdao.searchteaallpage(key, selectStyle);
            //总人数
            int counts = tdao.findtea(key, selectStyle);
            sb.append("</table><div><span>共");
            sb.append(pages);
            sb.append("页");
            sb.append(counts);
            sb.append("个用户</span>&nbsp;&nbsp;");
            sb.append("<label><a href=\"./ShowUserInfo?page=1&type=Teacher&key=" + key + "&selectStyle=" + selectStyle + "\" class=\"abtn\">首页</a></label>&nbsp;");
            int last = page - 1;
            if (last <= 0)
                last = 1;
            sb.append("<label><a href=\"./ShowUserInfo?page=" + last + "&type=Teacher&key=" + key + "&selectStyle=" + selectStyle + "\" class=\"abtn\">上一页</a></label>&nbsp;");
            int next = page + 1;
            if (next > pages)
                next = pages;
            sb.append("<label><a href=\"./ShowUserInfo?page=" + next + "&type=Teacher&key=" + key + "&selectStyle=" + selectStyle + "\" class=\"abtn\">下一页</a></label>&nbsp;");
            sb.append("<label><a href=\"./ShowUserInfo?page=" + pages + "&type=Teacher&key=" + key + "&selectStyle=" + selectStyle + "\" class=\"abtn\">尾页</a></label>&nbsp;&nbsp;");
            sb.append("<span>当前第");
            sb.append(page);
            sb.append("页</span></div>");

        } else {
            sb.append("<table class=\"table table-hover table-bordered\">");
            sb.append("<caption><span id=\"titleChange\">学生用户信息</span></caption>");
            sb.append("<thead><tr><th>学号</th><th>姓名</th><th>性别</th><th>身份证号</th>");
            sb.append("<th>系别</th><th>密码</th><th>电话号码</th><th>操作</th></tr></thead>");

            List<student> list = tdao.searchstudent(key, selectStyle, page);
            for (int i = 0; i < list.size(); i++) {
                sb.append("<tr><td>");
                sb.append(list.get(i).getSid());
                sb.append("</td><td>");
                sb.append(list.get(i).getSname());
                sb.append("</td><td>");
                sb.append(list.get(i).getSex());
                sb.append("</td><td>");
                sb.append(list.get(i).getCardnumber());
                sb.append("</td><td>");
                sb.append(list.get(i).getDepartment());
                sb.append("</td><td>");
                sb.append(list.get(i).getPwd());
                sb.append("</td><td>");
                sb.append(list.get(i).getPhone());
                sb.append("</td><td>");
                sb.append("<form action=\"DeleteUser?type=" + type + "&id=" + list.get(i).getSid() + "&page=" + page + "&key=" + key + "&selectStyle=" + selectStyle + "\" method=\"post\" onsubmit=\"return checkDelete()\">");
                sb.append("<button class=\"btn btn-primary\" data-toggle=\"modal\" data-target=\"#myModal1\" type=\"button\" onclick=\"editTest(this)\">修改</button>");
                sb.append("<button class=\"btn btn-primary\" type=\"submit\">删除</button></form></td></tr>");
            }
            //总页数
            int pages = tdao.searchstuallpage(key, selectStyle);
            //总人数
            int counts = tdao.findstu(key, selectStyle);
            sb.append("</table><div><span>共");
            sb.append(pages);
            sb.append("页");
            sb.append(counts);
            sb.append("个用户</span>&nbsp;&nbsp;");
            sb.append("<label><a href=\"./ShowUserInfo?page=1&type=Student&key=" + key + "&selectStyle=" + selectStyle + "\" class=\"abtn\">首页</a></label>&nbsp;");
            int last = page - 1;
            if (last <= 0)
                last = 1;
            sb.append("<label><a href=\"./ShowUserInfo?page=" + last + "&type=Student&key=" + key + "&selectStyle=" + selectStyle + "\" class=\"abtn\">上一页</a></label>&nbsp;");
            int next = page + 1;
            if (next > pages)
                next = pages;
            sb.append("<label><a href=\"./ShowUserInfo?page=" + next + "&type=Student&key=" + key + "&selectStyle=" + selectStyle + "\" class=\"abtn\">下一页</a></label>&nbsp;");
            sb.append("<label><a href=\"./ShowUserInfo?page=" + pages + "&type=Student&key=" + key + "&selectStyle=" + selectStyle + "\" class=\"abtn\">尾页</a></label>&nbsp;&nbsp;");
            sb.append("<span>当前第");
            sb.append(page);
            sb.append("页</span></div>");
        }
        request.setAttribute("UserTable", sb);
        request.getRequestDispatcher("./jsp/personManage.jsp").forward(request, response);
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        doGet(request, response);
    }

}

ShowUserInfo

package org.exam.servlet;

import java.io.IOException;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.exam.dao.TestDAO;
import org.exam.dao.factory.DaoFactory;
import org.exam.databean.choicequestion;
import org.exam.databean.fillquestion;

@WebServlet("/TestManage")
public class TestManage extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    public TestManage() {
        super();
        // TODO Auto-generated constructor stub
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("UTF-8");
        int page = Integer.valueOf(request.getParameter("page"));
        String type = request.getParameter("type");
        String keyword = request.getParameter("key");
        request.setAttribute("type", type);
        request.setAttribute("key", keyword);
        request.setAttribute("page", page);
        TestDAO tdao = DaoFactory.gettestdao();
        StringBuffer sb = new StringBuffer();
        if (type.equals("Choice")) {
            List<choicequestion> list = tdao.findtitle(page, "0", keyword);        
            sb.append("<table style=\"table-layout:fixed\" class=\"table table-hover table-bordered\">");
            sb.append("<caption>选择题</caption><thead><tr>");
            sb.append("<th>试题ID</th><th>题目</th><th>选项A</th><th>选项B</th><th>选项C</th><th>选项D</th><th>答案</th><th>操作</th></tr></thead>");
            
            for (int i = 0; i < list.size(); i++) {
                sb.append("<tr><td>");
                sb.append(list.get(i).getC_id());
                sb.append("</td><td>");
                sb.append(list.get(i).getC_question());
                sb.append("</td><td>");
                sb.append(list.get(i).getC_choiceA());
                sb.append("</td><td>");
                sb.append(list.get(i).getC_choiceB());
                sb.append("</td><td>");
                sb.append(list.get(i).getC_choiceC());
                sb.append("</td><td>");
                sb.append(list.get(i).getC_choiceD());
                sb.append("</td><td>");
                sb.append(list.get(i).getC_answer());
                sb.append("</td>");
                sb.append("<td><button class=\"btn btn-primary\" data-toggle=\"modal\" data-target=\"#myModal1\" onclick=\"editTest(this)\">修改</button><br/>");
                sb.append("<form action=\"./DeleteServlet?type=Choice&id=" + list.get(i).getC_id() + "&page=" + page + "&key=" + keyword + "\" method=\"post\" onsubmit=\"return checkDelete()\">");
                sb.append("<button class=\"btn btn-primary\" type=\"submit\">删除</button></form></td></tr>");
            }
            //总页数
            int pages = tdao.searchallpage("0", keyword);
            //总题数
            int counts = tdao.searchallchoice(keyword);
            sb.append("</table><div><span>共");
            sb.append(pages);
            sb.append("页");
            sb.append(counts);
            sb.append("题</span>&nbsp;&nbsp;<label>");
            sb.append("<a href=\"./TestManage?page=1&type=Choice&key=" + keyword + "\" class=\"abtn\">首页</a></label>&nbsp;");
            //
            int last = page - 1;
            if (last <= 0)
                last = 1;
            sb.append("<label><a href=\"./TestManage?page=" + last + "&type=Choice&key=" + keyword + "\" class=\"abtn\">上一页</a></label>&nbsp;");
            //
            int next = page + 1;
            if (next > pages)
                next = pages;
            sb.append("<label><a href=\"./TestManage?page=" + next + "&type=Choice&key=" + keyword + "\" class=\"abtn\">下一页</a></label>&nbsp;");
            sb.append("<label><a href=\"./TestManage?page=" + pages + "&type=Choice&key=" + keyword + "\" class=\"abtn\">尾页</a></label>&nbsp;&nbsp;");
            sb.append("<span>当前第" + page + "页</span></div>");
            
        } else {
            List<fillquestion> list = tdao.findtitle(page, "1", keyword);
            sb.append("<table class=\"table table-hover table-bordered\">");
            sb.append("<caption>填空题</caption><thead><tr>");
            sb.append("<th>试题ID</th><th>题目</th><th>答案</th><th>操作</th></tr></thead>");
            
            for (int i = 0; i < list.size(); i++) {
                sb.append("<tr><td>");
                sb.append(list.get(i).getF_id());
                sb.append("</td><td>");
                sb.append(list.get(i).getF_question());
                sb.append("</td><td>");
                sb.append(list.get(i).getF_answer());
                sb.append("</td>");
                sb.append("<td><button class=\"btn btn-primary\" data-toggle=\"modal\" data-target=\"#myModal2\" onclick=\"editTest(this)\">修改</button><br/>");
                sb.append("<form action=\"./DeleteServlet?type=Completion&id=" + list.get(i).getF_id() + "&page=" + page + "&key=" + keyword + "\" method=\"post\" onsubmit=\"return checkDelete()\">");
                sb.append("<button class=\"btn btn-primary\" type=\"submit\">删除</button></form></td></tr>");
            }
            //总页数
            int pages = tdao.searchallpage("1", keyword);
            //总题数
            int counts = tdao.searchallfill(keyword);
            sb.append("</table><div><span>共");
            sb.append(pages);
            sb.append("页");
            sb.append(counts);
            sb.append("题</span>&nbsp;&nbsp;<label>");
            sb.append("<a href=\"./TestManage?page=1&type=Completion&key=" + keyword + "\" class=\"abtn\">首页</a></label>&nbsp;");
            //
            int last = page - 1;
            if (last <= 0)
                last = 1;
            sb.append("<label><a href=\"./TestManage?page=" + last + "&type=Completion&key=" + keyword + "\" class=\"abtn\">上一页</a></label>&nbsp;");
            //
            int next = page + 1;
            if (next > pages)
                next = pages;
            sb.append("<label><a href=\"./TestManage?page=" + next + "&type=Completion&key=" + keyword + "\" class=\"abtn\">下一页</a></label>&nbsp;");
            sb.append("<label><a href=\"./TestManage?page=" + pages + "&type=Completion&key=" + keyword + "\" class=\"abtn\">尾页</a></label>&nbsp;&nbsp;");
            sb.append("<span>当前第" + page + "页</span></div>");            
        }
        request.setAttribute("Table", sb);
        //response.setContentType("text/html; charset=UTF-8");
        request.getRequestDispatcher("./jsp/testManage.jsp").forward(request, response);
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }

}

TestManager

package org.exam.servlet;

import java.io.IOException;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.exam.dao.TestDAO;
import org.exam.dao.factory.DaoFactory;
import org.exam.databean.testpaper;

@WebServlet("/TestSubmit")
public class TestSubmit extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    public TestSubmit() {
        super();
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("UTF-8");
        TestDAO tdao = DaoFactory.gettestdao();
        List<testpaper> list = tdao.findanswer();
        int score = 0;
        String answer = " ";
        for (int i = 1; i <= list.size(); i++)  {
            answer = request.getParameter("t" + i);
            //System.out.println("answer" + i + "=" + answer);
            if (answer != null) {
                if (answer.equals(list.get(i - 1).getAnswer()))
                    score += 2;
            }                
        }
        HttpSession session = request.getSession();
        tdao.savescore(session.getAttribute("stuID").toString(), score);
        request.setAttribute("score", score);
        //request.setAttribute("aTest", "alearlyTest");
        request.getRequestDispatcher("./jsp/stuMenu.jsp").forward(request, response);
        //System.out.println(score);
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }

}

TestSubmit

package org.exam.servlet;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.exam.dao.TestDAO;
import org.exam.dao.factory.DaoFactory;

@WebServlet("/UpdatePassword")
public class UpdatePassword extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    public UpdatePassword() {
        super();
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("UTF-8");
        
        String ID = request.getParameter("id");
        String type = request.getParameter("type");
        String Password = request.getParameter("newPassword");
        
        TestDAO tdao = DaoFactory.gettestdao();
        int result = 0;
        if(type.equals("Student")) {
            result = tdao.updatespwd(ID, Password);
        }else if(type.equals("teacher")) {
            result = tdao.updatetpwd(ID, Password);
        }else if(type.equals("admin")) {
            result = tdao.updateapwd(ID, Password);
        }
        String Result="0";
        HttpSession session = request.getSession();
        if(result!=0){
            session.setAttribute("PassWord", Password);
            Result="OK";
        }else
            Result="NO";
        if(type.equals("Student"))
            request.getRequestDispatcher("./jsp/stuMenu.jsp?Result="+Result).forward(request, response);
        else if(type.equals("teacher")||type.equals("admin"))
            request.getRequestDispatcher("./jsp/updatePwd.jsp?Result="+Result).forward(request, response);
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }

}

UpdatePassword

package org.exam.servlet;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.exam.dao.TestDAO;
import org.exam.dao.factory.DaoFactory;
import org.exam.databean.choicequestion;
import org.exam.databean.fillquestion;

@WebServlet("/UpdateServlet")
public class UpdateServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    public UpdateServlet() {
        super();
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("UTF-8");
        String type = request.getParameter("type");
        int page = Integer.valueOf(request.getParameter("page"));
        String key = request.getParameter("key");
        TestDAO tdao = DaoFactory.gettestdao();
        if (type.equals("Choice")) {
            choicequestion cq = new choicequestion();
            System.out.println(request.getParameter("testID"));
            cq.setC_id(Integer.valueOf(request.getParameter("testID")));
            cq.setC_question(request.getParameter("Title"));
            cq.setC_choiceA(request.getParameter("OptionA"));
            cq.setC_choiceB(request.getParameter("OptionB"));
            cq.setC_choiceC(request.getParameter("OptionC"));
            cq.setC_choiceD(request.getParameter("OptionD"));
            cq.setC_answer(request.getParameter("answer"));
            tdao.updatechoice(cq);
        } else {
            fillquestion fq = new fillquestion();
            fq.setF_id(Integer.valueOf(request.getParameter("testID")));
            fq.setF_question(request.getParameter("Title"));
            fq.setF_answer(request.getParameter("answer"));
            tdao.updatefill(fq);
        }
        request.setAttribute("type", type);
        request.setAttribute("key", key);
        request.setAttribute("page", page);
        response.setContentType("text/html; charset=UTF-8");
        //response.sendRedirect("./TestManage?page=" + page + "&type=" + type + "&key=" + key);
        request.getRequestDispatcher("./TestManage?page=" + page + "&type=" + type + "&key=" + key).forward(request, response);
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        doGet(request, response);
    }

}

updateServlet

package org.exam.servlet;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.exam.dao.TestDAO;
import org.exam.dao.factory.DaoFactory;
import org.exam.databean.student;
import org.exam.databean.teacher;

@WebServlet("/UpdateUser")
public class UpdateUser extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    public UpdateUser() {
        super();
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("UTF-8");
        String type = request.getParameter("type");
        int page = Integer.valueOf(request.getParameter("page"));
        String key = request.getParameter("key");
        String selectStyle = request.getParameter("selectStyle");
        TestDAO tdao = DaoFactory.gettestdao();
        if (type.equals("Teacher")) {
            teacher t = new teacher();
            t.setTid(request.getParameter("ID"));
            t.setTname(request.getParameter("name"));
            t.setSex(request.getParameter("sex"));
            t.setCardnumber(request.getParameter("IDcard"));
            t.setPwd(request.getParameter("pwd"));
            t.setTitle(request.getParameter("perType"));
            t.setPhone(request.getParameter("phone"));
            tdao.updateteacher(t);
        } else {
            student s = new student();
            s.setSid(request.getParameter("ID"));
            s.setSname(request.getParameter("name"));
            s.setSex(request.getParameter("sex"));
            s.setCardnumber(request.getParameter("IDcard"));
            s.setPwd(request.getParameter("pwd"));
            s.setDepartment(request.getParameter("perType"));
            s.setPhone(request.getParameter("phone"));
            tdao.updatestudent(s);
        }
        request.setAttribute("type", type);
        request.setAttribute("key", key);
        request.setAttribute("page", page);
        request.setAttribute("selectStyle", selectStyle);
        request.getRequestDispatcher("./ShowUserInfo?page=" + page + "&type=" + type + "&key=" + key + "&selectStyle=" + selectStyle).forward(request, response);
    }
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }

}

UpdateUser

package org.exam.servlet;

import java.io.IOException;
import java.sql.SQLException;
import java.util.Date;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.exam.dao.TestDAO;
import org.exam.dao.factory.DaoFactory;

import com.jspsmart.upload.File;
import com.jspsmart.upload.Files;
import com.jspsmart.upload.Request;
import com.jspsmart.upload.SmartUpload;
import com.jspsmart.upload.SmartUploadException;

@WebServlet("/UploadFileQuestions")
public class UploadFileQuestions extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    public UploadFileQuestions() {
        super();
    }
    ServletConfig servletconfig;
    
    public void init(ServletConfig config) throws ServletException {
        this.servletconfig = config;
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("UTF-8");
        SmartUpload smartUpload = new SmartUpload();
        //上传初始化
        smartUpload.initialize(servletconfig,request,response);
        try {
              //设定上传限制
              //限制每个上传文件的最大长度;将最大设定为1024*1024*20
              smartUpload.setMaxFileSize(1024*1024*10);   
              //限制总上传数据的长度
              smartUpload.setTotalMaxFileSize(1024*1024*20);
              //限制允许上传的文件类型、允许doc、txt文件
              smartUpload.setAllowedFilesList("doc,txt,docx");
              //限制禁止上传的文件类型,禁止exe、jsp、和没有扩展名的文件
              smartUpload.setDeniedFilesList("exe,jsp,,");
              //上传文件
              smartUpload.upload();          
              //smartUpload.save(path);
        } catch (SQLException e) {
              e.printStackTrace();
        } catch (SmartUploadException e) {
              e.printStackTrace();
        }
        long d = new Date().getTime();
        Files files = smartUpload.getFiles();
        File file = files.getFile(0);
        String fileName = String.valueOf(d) + "." + file.getFileExt();
        //String path = "/upload/" + fileName;
        String path = "D:/" + fileName;
        //将文件保存到指定的目录下
        try {
            file.saveAs(path);
        } catch (SmartUploadException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        Request r = smartUpload.getRequest();
        String type = r.getParameter("type1");
        ReadFile rf = new ReadFile(fileName);
        if (type.equals("Choice")) {   
            if (rf.readChoiceFile() != 0) {
                request.setAttribute("upload", "upload");
                request.getRequestDispatcher("./jsp/upload.jsp").forward(request, response);
            } else {
                request.setAttribute("uploadFail", "uploadFail");
                request.getRequestDispatcher("./jsp/upload.jsp").forward(request, response);
            }
        } else {
            if (rf.readFillFile() != 0) {
                request.setAttribute("upload", "upload");
                request.getRequestDispatcher("./jsp/upload.jsp").forward(request, response);
            } else {
                request.setAttribute("uploadFail", "uploadFail");
                request.getRequestDispatcher("./jsp/upload.jsp").forward(request, response);
            }
        }
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        doGet(request, response);
    }

}

UpdateFileQuestions

package org.exam.servlet;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.exam.dao.TestDAO;
import org.exam.dao.factory.DaoFactory;
import org.exam.databean.choicequestion;
import org.exam.databean.fillquestion;

@WebServlet("/UploadQuestions")
public class UploadQuestions extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    public UploadQuestions() {
        super();
        // TODO Auto-generated constructor stub
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("UTF-8");
        TestDAO tdao = DaoFactory.gettestdao();
        String type = request.getParameter("type");
        if (type.equals("Choice")) {
            choicequestion cq = new choicequestion();
            cq.setC_question(request.getParameter("choiceTitle"));
            cq.setC_choiceA("A." + request.getParameter("OptionA"));
            cq.setC_choiceB("B." + request.getParameter("OptionB"));
            cq.setC_choiceC("C." + request.getParameter("OptionC"));
            cq.setC_choiceD("D." + request.getParameter("OptionD"));
            cq.setC_answer(request.getParameter("answer"));
            if (tdao.savechoiceq(cq) != 0) {
                request.setAttribute("upload", "upload");
                request.getRequestDispatcher("./jsp/upload.jsp").forward(request, response);
            } else {
                request.setAttribute("uploadFail", "uploadFail");
                request.getRequestDispatcher("./jsp/upload.jsp").forward(request, response);
            }
            
        } else {
            fillquestion fq = new fillquestion();
            fq.setF_question(request.getParameter("completionTitle"));
            fq.setF_answer(request.getParameter("answerText"));
            if(tdao.savefillq(fq) != 0) {
                request.setAttribute("upload", "upload");
                request.getRequestDispatcher("./jsp/upload.jsp").forward(request, response);
            } else {
                request.setAttribute("uploadFail", "uploadFail");
                request.getRequestDispatcher("./jsp/upload.jsp").forward(request, response);
            }
        }            
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }

}

UpdateQuestions

6.工具类

package org.exam.util;
import java.sql.*;

public class DbUtil {
    private static final String URL = "jdbc:mysql://localhost:3306/examonline?characterEncoding=utf-8";
    private static final String USER = "root";
    private static final String PASSWORD = "123456";
    protected static PreparedStatement s=null;
    protected static ResultSet rs = null;
    protected static Connection conn = null;
    public static synchronized Connection getConnection()
    {
        try {
            Class.forName("com.mysql.jdbc.Driver");
            conn = DriverManager.getConnection(URL, USER, PASSWORD);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return conn;
    }
    public static int executeUpdate(String sql)
    {
        int result = 0;
        try {
            s = getConnection().prepareStatement(sql);
            result = s.executeUpdate(sql);
        } catch (SQLException e) {
            
            e.printStackTrace();
        }
        return result;
    }
    public static ResultSet executeQuery(String sql)
    {
        
        try {
            s = getConnection().prepareStatement(sql);
            rs = s.executeQuery(sql);
        } catch (SQLException e) {
            
            e.printStackTrace();
        }
        return rs;
    }
    public static PreparedStatement executePreparedStatement(String sql)
    {
        PreparedStatement ps = null;
        try
        {
            ps = getConnection().prepareStatement(sql);
        }catch(Exception e)
        {
            e.printStackTrace();
        }
        return ps;
    }
    public static void rollback() {
        try {
            getConnection().rollback();
        } catch (SQLException e) {
            
            e.printStackTrace();
        }
        
    }
    public static void close()
    {
        try
        {
            if(rs!=null)
                rs.close();
            if(s!= null)
                s.close();
            if(conn!=null)
                conn.close();
            
        }catch(SQLException e)
        {
            e.printStackTrace();
        }
    }
}

DBUtil

7.未完成部分：

　　●缺少访问控制功能（session验证）

　　●考试试卷不能正常生成

　　●缺少事务控制

　　●前端部分页面未实现