jsp如何重定向网页 -tutorial js-php.cn

jsp如何重定向网页

一个新手

Lepaskan： 2017-09-26 10:17:43

asal

2155 orang telah melayarinya

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 &#39;login.jsp&#39; 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

Salin selepas log masuk

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 &#39;receive.jsp&#39; 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>

Salin selepas log masuk

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 &#39;correct.jsp&#39; 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>

Salin selepas log masuk

运行结果（正确）：