web.xml文件：
1 <?xml version="1.0" encoding="UTF-8"?>
2 <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
3 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
4 <session-config>
5 <session-timeout>10</session-timeout>
6 </session-config>
7 <welcome-file-list>
8 <welcome-file>index.jsp</welcome-file>
9 </welcome-file-list>
10 <filter>
11 <filter-name>UrlRewriterHelper</filter-name>
12 <filter-class>helper.UrlRewriterHelper</filter-class>
13 </filter>
14 <filter-mapping>
15 <filter-name>UrlRewriterHelper</filter-name>
16 <url-pattern>/*</url-pattern>
17 </filter-mapping>
18 </web-app>
web.xml
UrlRewriterHelper文件：
1 package helper;
2
3 import java.io.IOException;
4 import java.net.HttpRetryException;
5
6 import javax.servlet.Filter;
7 import javax.servlet.FilterChain;
8 import javax.servlet.FilterConfig;
9 import javax.servlet.RequestDispatcher;
10 import javax.servlet.ServletException;
11 import javax.servlet.ServletRequest;
12 import javax.servlet.ServletResponse;
13 import javax.servlet.http.HttpServletRequest;
14
15 public class UrlRewriterHelper implements Filter {
16
17 @Override
18 public void destroy() {
19 // TODO Auto-generated method stub
20
21 }
22
23 @Override
24 public void doFilter(ServletRequest arg0, ServletResponse response,
25 FilterChain arg2) throws IOException, ServletException {
26 // TODO Auto-generated method stub
27 if (arg0 instanceof HttpServletRequest) {
28 HttpServletRequest request = (HttpServletRequest) arg0;
29 String url = request.getRequestURI();
30 int beginIndex = url.lastIndexOf(".htm");
31 if (beginIndex == url.length() - 4) {
32 String newUrl = url.substring(0, beginIndex) + ".jsp";
33 String contextRoot = request.getContextPath();
34 beginIndex = newUrl.indexOf(contextRoot);
35 if (beginIndex == 0) {
36 newUrl = newUrl.substring(contextRoot.length());
37 RequestDispatcher dispatcher = request.getRequestDispatcher(newUrl);
38 dispatcher.forward(request, response);
39 return;
40 }
41 }
42 }
43 arg2.doFilter(arg0, response);
44 }
45
46 @Override
47 public void init(FilterConfig arg0) throws ServletException {
48 // TODO Auto-generated method stub
49
50 }
51
52 }
UrlRewriterHelper
Jsp通过Filter实现UrlRewriter原理,布布扣,bubuko.com
时间： 2024-12-26 18:11:24