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 <welcome-file-list> 5 <welcome-file>index.jsp</welcome-file> 6 </welcome-file-list> 7 <filter> 8 <filter-name>UrlRewriterHelper</filter-name> 9 <filter-class>helper.UrlRewriterHelper</filter-class> 10 </filter> 11 <filter-mapping> 12 <filter-name>UrlRewriterHelper</filter-name> 13 <url-pattern>/*</url-pattern> 14 </filter-mapping> 15 </web-app>