目录
1.建立数据库管理层com.java.dao
package com.java.dao;
import org.hibernate.Query;
import org.hibernate.Session;
import com.java.model.Student;
import com.java.util.HibernateUtil;
public class StudentDao {
public Student login(Student student)throws Exception{
//获取当前的session
Session session=HibernateUtil.getSessionFactory().getCurrentSession();
//开启事务
session.beginTransaction();
//获取query，利用query获取所有信息
Query query=session.createQuery("from Student as s where s.id=:id and s.password=:password");
//设置登录的id和password
query.setString("id", student.getId());
query.setString("password", student.getPassword());
//来获取用户登录的信息，包括id和password
Student resultStu=(Student)query.uniqueResult();
//提交事务
session.getTransaction().commit();
//最后返回用户所填写的登录信息
return resultStu;
}
}
2.struts的action类
package com.java.action;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import org.apache.struts2.interceptor.ServletRequestAware;
import com.java.dao.StudentDao;
import com.java.model.Student;
import com.opensymphony.xwork2.ActionSupport;
public class StudentAction extends ActionSupport implements ServletRequestAware{
/**
*
*/
private static final long serialVersionUID = 1L;
//定义request
private HttpServletRequest request;
private StudentDao studentDao=new StudentDao();
private Student student;
//登录时的错误信息
private String error;
public Student getStudent() {
return student;
}
public void setStudent(Student student) {
this.student = student;
}
public String getError() {
return error;
}
public void setError(String error) {
this.error = error;
}
//登录方法
public String login() throws Exception{
//获取session
HttpSession session=request.getSession();
//调用登录方法
Student currentUser=studentDao.login(student);
//进行判断
if(currentUser==null){
error="准考证号或密码错误";
return ERROR;
}else{
//将正确信息存入session
session.setAttribute("currentUser", currentUser);
return SUCCESS;
}
}
@Override
public void setServletRequest(HttpServletRequest request) {
// TODO Auto-generated method stub
this.request=request;
}
}
3.struts的配置文件struts.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
"http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
<!-- name是给包取名 extends后面继承struts-default-->
<package name="studentInfo" namespace="/" extends="struts-default">
<action name="student" class="com.java.action.StudentAction">
<result name="success" type="redirect">/main.jsp</result>
<result name="error">/login.jsp</result>
</action>
</package>
</struts>4.登录界面login.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>在线考试系统学生登录界面</title>
<link href="${pageContext.request.contextPath}/style/exam.css" rel="stylesheet">
<link href="${pageContext.request.contextPath}/bootstrap/css/bootstrap.css" rel="stylesheet">
<link href="${pageContext.request.contextPath}/bootstrap/css/bootstrap-responsive.css" rel="stylesheet">
<script src="${pageContext.request.contextPath}/bootstrap/js/jQuery.js"></script>
<script src="${pageContext.request.contextPath}/bootstrap/js/bootstrap.js"></script>
<script type="text/javascript">
/* 登录按钮功能 */
function checkForm(){
/* 获取当前用户输入的id和password */
var id=document.getElementById("id").value;
var password=document.getElementById("password").value;
/* 这里进行判断 */
if(id==null || id==""){
alert("准考证号不能为空！");
return false;
}
if(password==null || password==""){
alert("登录密码不能为空！");
return false;
}
return true;
}
/* 重置按钮功能 */
function resetValue(){
document.getElementById("id").value="";
document.getElementById("password").value="";
}
</script>
</head>
<body>
<div align="center">
<form action="student!login" method="post" onsubmit="return checkForm()">
<!-- 根据具体的图片大小尺寸 -->
<table width="1536" height="735" background="image/login.jpg">
<tr height="100">
<td colspan="4"></td>
</tr>
<!-- 第一行，准考证号 -->
<tr height="10">
<td width=20%></td>
<td><label style="color: black; text-shadow: 0 0 black; font-size: 18px">准考证号:</label></td>
<td><input type="text" style="font-size: 18px" id="id" name="student.id" value="${student.id }"/></td>
<td width=60%></td>
</tr>
<!-- 第二行，登录密码 -->
<tr height="50">
<td width=20%></td>
<td><label style="color: black; text-shadow: 0 0 black; font-size: 18px">登录密码:</label></td>
<td><input type="password" style="font-size: 18px" id="password" name="student.password" value="${student.password }"/></td>
<td width=60%></td>
</tr>
<!-- 第三行，登录密码 -->
<tr height="50">
<td width=20%></td>
<td align="center"><button type="submit" class="btn btn-primary">登录</button></td>
<td align="center"><button type="button" class="btn btn-primary" onclick="resetValue()">重置</button></td>
<td width=60%></td>
</tr>
<tr height="100">
<td colspan="4"></td>
</tr>
</table>
</form>
</div>
<!-- 错误信息提示 -->
<script>
if('${error}'!=''){
alert('${error}');
}
</script>
</body>
</html>这里我们运行一下看看；
