<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<body>
<form action="2.jsp"method="post">
姓名:<input type="text"name="RdName"><br>
密码:<input type="password"name="RdPasswd"><br><br>
<input type="submit"value="确定">
</form>
</body>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<body>
<%request.setCharacterEncoding("utf-8");
String Name=request.getParameter("RdName");
String Passwd=request.getParameter("RdPasswd");
if(Name.equals("zhangjuan ")&&Passwd.equals("3152052051439")){%>
<jsp:forward page="3.jsp"/>
<%}else{%>
<jsp:forward page="4.jsp"/>
<%} %>
</body>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<body>
<% String Name=request.getParameter("RdName");%>
欢迎<%=Name%>成功登录！
</body>
<%@ page language="java" import="java.util.*" pageEncoding="Utf-8"%>
<html>
<head><title>登录出错</title></head>
<body>
<h4>用户名或密码错误，请重新登录</h4>
<a href="1.jsp">重新登录</a>
<hr width="100%" size="2"color="green">
</body>
</html>
原文：http://www.cnblogs.com/htmll/p/7615854.html