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<%@ 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> <% session.invalidate(); %> <form action="NewFile1.jsp"> 用户名：<input type="text" name="name"> 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> <% String name=new String (request.getParameter("name").getBytes("ISO-8859-1"),"UTF-8"); String pw=request.getParameter("password"); if(name!=null&&pw!=null) { if(name.equals("张三")&&pw.equals("123")) { out.print("登录成功"); session.setAttribute("name", name); response.setHeader("refresh", "3;URL=NewFile2.jsp"); } else { out.print("用户名或密码错误,正在跳转登录页面"); response.setHeader("refresh", "5;URL=NewFile.jsp"); } } else { out.print("请使用正确的方式登录"); } %> </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> <% Object obj=session.getAttribute("name"); if(obj!=null) { out.print("欢迎登录，"+obj.toString()); } else { out.print("请以正确的方式登录"); response.setHeader("refresh", "3;URL=NewFile.jsp"); } %> <br> <a href="NewFile.jsp">退出登录</a> </body> </html>
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原文地址：http://www.cnblogs.com/wallan/p/5625633.html
