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>