关于java过滤器的问题。

  哪个大哥对过滤器熟啊，很着急。
<?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" 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"> <display-name>PMSS</display-name>    <!-- 解决与CASClient作了集成的WebApp中的某些页面被另外的网站用iframe集成后，IE6中“无法显示网页”的问题 -->    <filter>
        <filter-name>SetResponseHeaderFilter</filter-name>
        <filter-class>com.ybhy.common.web.SetResponseHeaderFilter</filter-class>
        <init-param>
            <param-name>name</param-name>
            <param-value>P3P</param-value>
        </init-param>
        <init-param>
            <param-name>value</param-name>
            <param-value>CP=CAO PSA OUR</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>SetResponseHeaderFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <filter-mapping>
        <filter-name>SetResponseHeaderFilter</filter-name>
        <url-pattern>*.*</url-pattern>
    </filter-mapping>
  
<!-- Login filter --> <filter>
<filter-name>LoginFilter</filter-name>
<filter-class>com.ybhy.common.web.SuperFilter</filter-class>
<init-param>
<param-name>url-pattern</param-name>
<param-value>((?!/ums_client_interface).)*</param-value>
</init-param>
<init-param>
<!-- PMSS的登录后处理 -->
<param-name>filter-class</param-name>
<param-value>org.springframework.web.filter.DelegatingFilterProxy</param-value>
</init-param>
<init-param>
<param-name>targetBeanName</param-name>
<param-value>loginFilter</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>LoginFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>LoginFilter</filter-name>
<url-pattern>*.*</url-pattern>
</filter-mapping> <!-- Spring --> <context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/classes/spring.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener> <!-- Struts2 --> <filter>
<filter-name>Struts2Filter</filter-name>
<filter-class>com.ybhy.common.web.SuperFilter</filter-class>
<init-param>
<param-name>url-pattern</param-name>
<param-value>((?!/ums_client_interface).)*</param-value>
</init-param>
<init-param>
<param-name>filter-class</param-name>
<param-value>org.apache.struts2.dispatcher.FilterDispatcher</param-value>
</init-param>
<init-param>
<param-name>config</param-name>
<param-value>struts-default.xml,struts-plugin.xml,struts2.xml</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>Struts2Filter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>Struts2Filter</filter-name>
<url-pattern>*.*</url-pattern>
</filter-mapping> <!-- UMS数据同部接口 --> <servlet>
<servlet-name>UMSClientInterfaceServlet</servlet-name>
<servlet-class>com.ybhy.umsinterface.web.UMSClientInterfaceServlet</servlet-class>
<init-param>
<param-name>config_file</param-name>
<param-value>ums_client.properties</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
  <servlet>
    <description>This is the description of my J2EE component</description>
    <display-name>This is the display name of my J2EE component</display-name>
    <servlet-name>FlvDownLoadServlet</servlet-name>
    <servlet-class>com.ybhy.pmss.app.common.FlvDownLoadServlet</servlet-class>
  </servlet>
  <servlet>
    <description>This is the description of my J2EE component</description>
    <display-name>This is the display name of my J2EE component</display-name>
    <servlet-name>FlvDownLoad</servlet-name>
    <servlet-class>com.ybhy.pmss.web.common.FlvDownLoad</servlet-class>
  </servlet>
<servlet-mapping>
<servlet-name>UMSClientInterfaceServlet</servlet-name>
<url-pattern>/ums_client_interface</url-pattern>
</servlet-mapping>
  <servlet-mapping>
    <servlet-name>FlvDownLoadServlet</servlet-name>
    <url-pattern>/FlvDownLoadServlet</url-pattern>
  </servlet-mapping>
  <servlet-mapping>
    <servlet-name>FlvDownLoad</servlet-name>
    <url-pattern>/FlvDownLoad</url-pattern>
  </servlet-mapping>

<!-- session 设定过期时间为一小时 -->
<session-config>
<session-timeout>60</session-timeout>
</session-config></web-app>
标红的地方是我配置过滤器，对不对？
就是为了判断用户登录与否，最好QQ能交谈，说的清楚写。