jsp重定向网页

来源：互联网发布：新加坡高中留学知乎编辑：程序博客网时间：2024/06/06 12:44

使用request对象中的sendRedirect()方法实现重定向（网页跳转）到另一个页面。

格式：request.sendRedirect("*.jsp");

与转发<jsp:forward page=""/>的区别：前者可以跳转到任一个地址的页面，后者只能在本网站内跳转。前者带着request中的信息跳转，后者不带。

示例：用户在登录界面输入登录名和密码，输入正确和错误分别跳转到不同的页面。

代码：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html>  <head>            <title>My JSP 'login.jsp' starting page</title>    <meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0">    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><meta http-equiv="description" content="This is my page"><!--<link rel="stylesheet" type="text/css" href="styles.css">-->  </head>    <body><form action="receive.jsp" method="post">姓名：<input type="text" name="rdname"><br>密码：<input type="text" name="rdpasswd"><br>    <input type="submit" value="确定"></form>  </body></html

receive.jsp

<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html>  <head>      <title>My JSP 'receive.jsp' starting page</title>   <meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0">    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><meta http-equiv="description" content="This is my page"><!--<link rel="stylesheet" type="text/css" href="styles.css">-->  </head>    <body>  <% String name=request.getParameter("rdname");     String passwd=request.getParameter("rdpasswd");     if(name.equals("abcd")&&passwd.equals("123456")){   %>   <jsp:forward page="correct.jsp"/>   <%}else{%>   <% response.sendRedirect("http://sohu.com");}%>     </body></html>

correct.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html>  <head>        <title>My JSP 'correct.jsp' starting page</title>    <meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0">    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><meta http-equiv="description" content="This is my page"><!--<link rel="stylesheet" type="text/css" href="styles.css">-->  </head>    <body>  <% String name=request.getParameter("rdname"); %>      欢迎，<%=name %>成功登陆！  </body></html>

运行结果（正确）：

运行结果（错误）：

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