标签:
设置三个页面,登录页面,判断页面,主页面。
<%@ 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>Insert title here</title> </head> <body> 登录页面 <br> <% //销毁 session.invalidate(); %> <form action="testPW.jsp" method="post"> 用户名:<input type="text" name="username"> 密码: <input type="password" name="password"> <input type="submit" value="登录"> </form> </body> </html>
<%@ 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>Insert title here</title> </head> <body> <% //检查session, 取得session信息 Object obj = session.getAttribute("username"); if(obj!=null) { out.print("欢迎登录"+obj.toString()); } else { out.print("会话超时,请重新登录系统"); response.setHeader("refresh", "3;URL=login.jsp "); } %> 主页面 <br> <a href="login.jsp">退出登录</a> </body> </html>
<%@ 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>Insert title here</title> </head> <body> <% //验证用户登录信息是否正确 String un = request.getParameter("username"); String pw = request.getParameter("password"); if(un!=null&&pw!=null) { //如果正确,就创建session,并跳转到main.jsp if(un.equals("tom")&&pw.equals("123")) { //记录用户信息 session.setAttribute("username", un); //跳转到系统主页面 response.sendRedirect("main.jsp"); } else { //否则就提示密码错误 out.print("用户名或密码错误"); } } else { out.print("请以正常的方式访问系统"); } %> </body> </html>
账户或者密码错误的时候
跳转别的页面,并且回到主页面,销毁原来的数据
标签:
原文地址:http://www.cnblogs.com/zhailiming/p/5626138.html