话不多说，直接上代码

创建一个Filter类

 1 package com.weibo.util;
 2 
 3 import java.io.IOException;
 4 
 5 import javax.servlet.Filter;
 6 import javax.servlet.FilterChain;
 7 import javax.servlet.FilterConfig;
 8 import javax.servlet.ServletException;
 9 import javax.servlet.ServletRequest;
10 import javax.servlet.ServletResponse;
11 import javax.servlet.http.HttpServletRequest;
12 import javax.servlet.http.HttpServletResponse;
13 /**
14  * 原理是，将所有的地址中包含JSP的访问拦截，将访问重定位到网站的跟目录
15  * @author yu
16  */
17 public class URLFilter implements Filter{
18 
19     @Override
20     public void destroy() {
21         // TODO Auto-generated method stub
22         
23     }
24 
25     @Override
26     public void doFilter(ServletRequest request, ServletResponse response,
27             FilterChain filterch) throws IOException, ServletException {
28         // TODO Auto-generated method stub
29         HttpServletRequest httpreq = (HttpServletRequest) request;
30         StringBuffer url = httpreq.getRequestURL();
31         if(url.indexOf("jsp") > 0)   //判断地址中是否包含"JSP"
32         {
33             HttpServletResponse httpres = (HttpServletResponse) response;
34             httpres.sendRedirect(httpreq.getContextPath());  //跳转到网站根目录，也可以根据自己的需要重定位到自己的Action
35             return;
36         }else{ //不包含JSP，则继续执行
37             filterch.doFilter(request, response);   
38         }
39         
40     }
41 
42     @Override
43     public void init(FilterConfig arg0) throws ServletException {
44         // TODO Auto-generated method stub
45         
46     }
47 
48 }

 

 

在web.xml中配置Filter，注意：应将此过滤器放在Struts的前面

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
 3   <display-name>final</display-name>
 4   <welcome-file-list>
 5     <welcome-file>index.html</welcome-file>
 6     <welcome-file>index.htm</welcome-file>
 7     <welcome-file>index.jsp</welcome-file>
 8     <welcome-file>default.html</welcome-file>
 9     <welcome-file>default.htm</welcome-file>
10     <welcome-file>default.jsp</welcome-file>
11   </welcome-file-list>
12      <filter>
13           <filter-name>URLfilter</filter-name>
14          <filter-class>com.weibo.util.URLFilter</filter-class>
15     </filter>
16     <filter-mapping>
17            <filter-name>URLfilter</filter-name>
18             <url-pattern>/*</url-pattern>
19     </filter-mapping>
20 
21   
22   <filter>
23      <filter-name>struts</filter-name>
24      <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
25   </filter>
26   <filter-mapping>
27      <filter-name>struts</filter-name>
28      <url-pattern>/*</url-pattern>
29   </filter-mapping>
30  
31 </web-app>