定义一个logind的jsp <%@ page language="java" import="java.util.*" contentType="text/html; charset=utf-8"%> <!DOCTYPE html> <html> <head> <meta charset="ISO-8859-1"> <title>Insert title here</title> </head> <body> <h1>用户登录</h1> <hr> <form action="forward.jsp" name="loginForm" method="post"> <table> <tr> <td>用户名:</td> <td><input type="text" name="username"/></td> </tr> <tr> <td>密码:</td> <td><input type="password" name="password"/></td> </tr> <tr> <td colspan="2"><input type="submit" value="登录"></td> </tr> </table> </body> </html>定义一个param <%@ page language="java" import="java.util.*" contentType="text/html; charset=utf-8"%> <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <meta http-equiv="pragma" content="no-cache"> <title>Insert title here</title> </head> <body> <h1>forward 动作</h1> <jsp:forward page="user.jsp"> <jsp:param value="admin@123.net" name="email"/> </jsp:forward> </body> </html>定义一个user <%@ page language="java" import="java.util.*" contentType="text/html; charset=utf-8"%> <!DOCTYPE html> <html> <head> <meta charset="ISO-8859-1"> <title>Insert title here</title> </head> <body> <h1>用户资料</h1> <% String username=""; String password = ""; String email=""; if(request.getParameter("username")!=null){ username = request.getParameter("username"); } if(request.getParameter("password")!=null){ password= request.getParameter("password"); } if(request.getParameter("email")!=null){ email= request.getParameter("email"); } %> 用户名:<%=username %> 密码:<%=password %>> 电子邮箱:<%=email %> </body> </html>