checkuserlogin.jsp

利用JAVA语言实现

<!--判断普通用户是否登陆成功-->
<%@ page language="java" import="java.sql.*,java.util.*"  pageEncoding="GB2312"%>
<jsp:useBean id="userManage" class="com.UserManage" scope="request"/>
<%
	String userName = (String)request.getParameter("userName");
	String userPwd = (String)request.getParameter("userPwd");
	int flag = 0; // 0:失败，1：成功
	
	if(userManage.checkUserLogin(userName, userPwd)){ //登陆成功
		flag = 1;
		session.setAttribute("userName", userName);
		session.setAttribute("userPwd", userPwd);
		
		String url = request.getHeader("Referer");  //上一个页面的Url
		response.sendRedirect(url); //返回上一页面
	}
%>
<%
	if(flag == 0){
%>
	<div align="center" style="font-size:22px; margin-top:200px">用户名或密码错误！</div>
	<br><br>
	<div align="center"><a href="javascript:history.go(-1)">返回</a></div>
<%}%>