ssm框架web.xml中filter配置问题

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" 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">
  <display-name>CarRental</display-name>
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>
            classpath:applicationContext-*.xml
        </param-value>
  </context-param>
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <filter>
    <filter-name>struts2Filter</filter-name>
    <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>struts2Filter</filter-name>
    
    <url-pattern>/system/*</url-pattern><!--允许通过的路径 ,这里必须在system目录下，才能够访问，比如

：localhost:8080/beyongmedical/system/WebServer_adminLogin-->
  </filter-mapping>
 
  <filter>
    <filter-name>SessionFilter</filter-name>
    <filter-class>util.SessionFilter</filter-class>    
     <init-param>    
        <param-name>excludedPages</param-name>    
        <param-value>/login.jsp,/insert.html,/doctor.html</param-value>    这里是要过不必要过滤的项目
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>SessionFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
 
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>