1 <%@ page language="java" contentType="text/html; charset=UTF-8" 2 pageEncoding="UTF-8"%> 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 4 <html> 5 <head> 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 7 <title>Insert title here</title> 8 </head> 9 <body> 10 <% 11 12 //检查session,取得session信息 13 Object obj = session.getAttribute("username"); 14 if(obj != null) 15 { 16 out.print("欢迎登录 "+obj.toString()); 17 } 18 else 19 { 20 out.print("会话超时，请重新登录系统"); 21 //3秒后跳转到用户界面 22 response.setHeader("refresh", "3;URL=Login.jsp"); 23 } 24 %> 25 主页面 26 <br> 27 <a href="Login.jsp">退出登录</a> 28 </body> 29 </html>
1 <%@ page language="java" contentType="text/html; charset=UTF-8" 2 pageEncoding="UTF-8"%> 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 4 <html> 5 <head> 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 7 <title>Insert title here</title> 8 </head> 9 <body> 10 登录页面 11 <br> 12 <% 13 //销毁session 14 session.invalidate(); 15 %> 16 17 <form action="TestPW.jsp" method = "post"> 18 用户名：<input type="text"name = "username"> 19 密码：<input type="password"name = "password"> 20 <input type="submit" value="登录"> 21 </form> 22 </body> 23 </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("asd") && 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 { //否则就提示登录错误 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>
