系统分为后台管理员和前台学生/教师三个权限角色.
管理员包含:管理员管理,教室管理,课程资料管理,教学视频管理,教师管理,学生管理,公告管理,留言管理
学生包含:个人信息修改,教学视频学习
教师包含:个人信息修改,发布教学视频
通用功能包含:留言板,公告查看,课程资料查看,注册登录
表4.1管理员信息表
| 名称 |
类型 |
说明 |
| userId |
int(11) |
编号 |
| userName |
longtext |
名称 |
| userPw |
longtext |
密码 |
说明：用户表用于存放管理员的信息。
package com.action;
import java.io.IOException;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.dao.DB;
import com.orm.TAdmin;
import com.orm.Tgonggao;
//import com.orm.Tuser;
import com.orm.Tzhuanye;
public class gonggao_servlet extends HttpServlet
{
public void service(HttpServletRequest req,HttpServletResponse res)throws ServletException, IOException
{
String type=req.getParameter("type");
if(type.endsWith("gonggaoAdd"))
{
gonggaoAdd(req, res);
}
if(type.endsWith("gonggaoMana"))
{
gonggaoMana(req, res);
}
if(type.endsWith("gonggaoDel"))
{
gonggaoDel(req, res);
}
if(type.endsWith("gonggaoDetail"))
{
gonggaoDetail(req, res);
}
if(type.endsWith("gonggaoDetailQian"))
{
gonggaoDetailQian(req, res);
}
if (type.equals("edit")) {
edit(req, res);
}
if (type.equals("saveedit")) {
saveedit(req, res);
}
}
public void gonggaoAdd(HttpServletRequest req,HttpServletResponse res)
{
//String id=String.valueOf(new Date().getTime());
String title=req.getParameter("title");
String content=req.getParameter("content");
String shijian=new Date().toLocaleString();
String sql="insert into t_gonggao values(?,?,?,?)";
Object[] params={null,title,content,shijian};
DB mydb=new DB();
mydb.doPstm(sql, params);
mydb.closed();
req.setAttribute("message", "操作成功");
req.setAttribute("path", "gonggao?type=gonggaoMana");
String targetURL = "/common/success.jsp";
dispatch(targetURL, req, res);
}
public void gonggaoDel(HttpServletRequest req,HttpServletResponse res)
{
String id=req.getParameter("id");
String sql="delete from t_gonggao where id=?";
Object[] params={id};
DB mydb=new DB();
mydb.doPstm(sql, params);
mydb.closed();
req.setAttribute("message", "操作成功");
req.setAttribute("path", "gonggao?type=gonggaoMana");
String targetURL = "/common/success.jsp";
dispatch(targetURL, req, res);
}
public void gonggaoMana(HttpServletRequest req,HttpServletResponse res) throws ServletException, IOException
{
String page1=req.getParameter("page");
if(page1==null){
page1="1";
}
//分页设置
int EVERYPAGENUM=20;//每页条数
int page=Integer.parseInt(page1); //传递过来的当前页
int cou = 1;//得到信息总数
int pagecount=1; //总页数
String sql1="select count(*) as cou from t_gonggao ";
if(req.getParameter("name")!=null)sql1+=" where title like '%"+req.getParameter("name").trim()+"%'";
Object[] params1={};
DB mydb1=new DB();
try
{
mydb1.doPstm(sql1, params1);
ResultSet rs=mydb1.getRs();
while(rs.next())
{
cou= rs.getInt("cou");
}
rs.close();
}
catch(Exception e)
{
e.printStackTrace();
}
mydb1.closed();
if (cou % EVERYPAGENUM == 0) {
pagecount= cou / EVERYPAGENUM;
} else {
pagecount=cou / EVERYPAGENUM + 1;
}
req.setAttribute("EVERYPAGENUM", EVERYPAGENUM);
req.setAttribute("page", page);
req.setAttribute("cou", cou);
req.setAttribute("pagecount", pagecount);
List gonggaoList=new ArrayList();
String sql="select * from t_gonggao";
if(req.getParameter("name")!=null)sql+=" where title like '%"+req.getParameter("name").trim()+"%'";
sql+=" order by id desc";
Object[] params={};
DB mydb=new DB();
try
{
mydb.doPstm(sql, params);
ResultSet rs=mydb.getRs();
for (int i = 0; i < (page - 1) * EVERYPAGENUM; i++) {
rs.next();
}
for (int t = 0; t < EVERYPAGENUM; t++) {
if (rs.next()) {
Tgonggao gonggao=new Tgonggao();
gonggao.setId(rs.getString("id"));
gonggao.setTitle(rs.getString("title"));
gonggao.setContent(rs.getString("content"));
gonggao.setShijian(rs.getString("shijian"));
gonggaoList.add(gonggao);
} else {
break; //减少空循环的时间
}
}
rs.close();
}
catch(Exception e)
{
e.printStackTrace();
}
mydb.closed();
req.setAttribute("gonggaoList", gonggaoList);
req.getRequestDispatcher("admin/gonggao/gonggaoMana.jsp").forward(req, res);
}
public void gonggaoDetail(HttpServletRequest req,HttpServletResponse res) throws ServletException, IOException
{
String id=req.getParameter("id");
Tgonggao gonggao=new Tgonggao();
String sql="select * from t_gonggao where id=?";
Object[] params={id};
DB mydb=new DB();
try
{
mydb.doPstm(sql, params);
ResultSet rs=mydb.getRs();
rs.next();
gonggao.setId(rs.getString("id"));
gonggao.setTitle(rs.getString("title"));
gonggao.setContent(rs.getString("content"));
gonggao.setShijian(rs.getString("shijian"));
rs.close();
}
catch(Exception e)
{
e.printStackTrace();
}
mydb.closed();
req.setAttribute("gonggao", gonggao);
req.getRequestDispatcher("admin/gonggao/gonggaoDetail.jsp").forward(req, res);
}
public void gonggaoDetailQian(HttpServletRequest req,HttpServletResponse res) throws ServletException, IOException
{
String id=req.getParameter("id");
Tgonggao gonggao=new Tgonggao();
String sql="select * from t_gonggao where id=?";
Object[] params={id};
DB mydb=new DB();
try
{
mydb.doPstm(sql, params);
ResultSet rs=mydb.getRs();
rs.next();
gonggao.setId(rs.getString("id"));
gonggao.setTitle(rs.getString("title"));
gonggao.setContent(rs.getString("content"));
gonggao.setShijian(rs.getString("shijian"));
rs.close();
}
catch(Exception e)
{
e.printStackTrace();
}
mydb.closed();
req.setAttribute("gonggao", gonggao);
req.getRequestDispatcher("/qiantai/gonggao/gonggaoDetailQian.jsp").forward(req, res);
}
public void edit(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
String id=req.getParameter("id");
Tgonggao gonggao=new Tgonggao();
String sql="select * from t_gonggao where id=?";
Object[] params={id};
DB mydb=new DB();
try
{
mydb.doPstm(sql, params);
ResultSet rs=mydb.getRs();
rs.next();
gonggao.setId(rs.getString("id"));
gonggao.setTitle(rs.getString("title"));
gonggao.setContent(rs.getString("content"));
gonggao.setShijian(rs.getString("shijian"));
rs.close();
}
catch(Exception e)
{
e.printStackTrace();
}
mydb.closed();
req.setAttribute("gonggao", gonggao);
req.getRequestDispatcher("admin/gonggao/edit.jsp").forward(req, res);
}
public void saveedit(HttpServletRequest req, HttpServletResponse res) {
String title=req.getParameter("title");
String content=req.getParameter("content");
String sql = "update t_gonggao set title='" + req.getParameter("title") + "',content='" + req.getParameter("content") + "' where id="
+ Integer.parseInt(req.getParameter("id"));
Object[] params = {};
DB mydb = new DB();
mydb.doPstm(sql, params);
mydb.closed();
req.setAttribute("message", "操作成功");
req.setAttribute("path", "gonggao?type=gonggaoMana");
String targetURL = "/common/success.jsp";
dispatch(targetURL, req, res);
}
public void dispatch(String targetURI,HttpServletRequest request,HttpServletResponse response)
{
RequestDispatcher dispatch = getServletContext().getRequestDispatcher(targetURI);
try
{
dispatch.forward(request, response);
return;
}
catch (ServletException e)
{
e.printStackTrace();
}
catch (IOException e)
{
e.printStackTrace();
}
}
public void init(ServletConfig config) throws ServletException
{
super.init(config);
}
public void destroy()
{
}
}