用refresh控制浏览器定时刷新

最新推荐文章于 2025-09-12 18:08:49 发布

转载最新推荐文章于 2025-09-12 18:08:49 发布 · 109 阅读

0 ·

CC 4.0 BY-SA版权

原文链接：http://www.cnblogs.com/aineko/p/3823359.html

文章标签：

#java

本文展示了一个使用Servlet实现页面自动跳转的例子。通过设置HTTP响应头中的refresh字段，可以实现在指定时间后浏览器自动跳转到另一个URL。此外，还介绍了如何在Servlet中设置字符编码、内容类型，并通过getWriter()方法输出HTML内容。

 1 package cn.itcast.response;
 2 
 3 import java.io.IOException;
 4 import java.util.Random;
 5 
 6 import javax.servlet.ServletException;
 7 import javax.servlet.http.HttpServlet;
 8 import javax.servlet.http.HttpServletRequest;
 9 import javax.servlet.http.HttpServletResponse;
10 
11 public class ResponseDemo extends HttpServlet {
12 
13     public void doGet(HttpServletRequest request, HttpServletResponse response)
14             throws ServletException, IOException {
15         
16         //实现的自动跳转技术
17         String message = "<meta http-equiv='refresh' content='3;url=http://localhost:8080/ServletDemo/index.jsp'>恭喜你，登录成功，奔浏览器将在3秒后，跳到首页，如果没有跳，请点击<a href=''>超链接</a>";
18         
19         this.getServletContext().setAttribute("message", message);
20         this.getServletContext().getRequestDispatcher("/MyJsp.jsp").forward(request, response);
21 
22         }
23     
24     
25 
26     private void test2(HttpServletResponse response) throws IOException {
27         // 假设这是一个用于处理登录的Servlet
28 
29         // 假设程序运行到此，用户登录成功
30         response.setCharacterEncoding("UTF-8");
31         response.setContentType("text/html;charset=UTF-8");
32 
33         response.setHeader("refresh",
34                 "3;url='http://localhost:8080/ServletDemo/index.jsp'");
35         response.getWriter().write(
36                 "恭喜你，登录成功，奔浏览器将在3秒后，跳到首页，如果没有跳，请点击<a href=''>超链接</a>");
37 
38     }
39 
40     private void test1(HttpServletResponse response) throws IOException {
41         response.setHeader("refresh", "3");
42 
43         String data = new Random().nextInt(100000) + "";
44         response.getWriter().write(data);
45     }
46 
47     public void doPost(HttpServletRequest request, HttpServletResponse response)
48             throws ServletException, IOException {
49 
50     }
51 
52 }

View Code

 1 <%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
 2 <%
 3 String path = request.getContextPath();
 4 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
 5 %>
 6 
 7 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 8 <html>
 9   <head>
10     <base href="<%=basePath%>">
11     
12     <title>My JSP 'MyJsp.jsp' starting page</title>
13     
14 
15   </head>
16   
17   <body>
18     <%
19         String message = (String)application.getAttribute("message");
20            out.write(message);
21     %>
22   </body>
23 </html>