struts中web.xml servlet配置不能实现.请高手看下。

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" 
 xmlns="http://java.sun.com/xml/ns/j2ee" 
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
 xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
 http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
  <servlet>
    <description>TRASIN-NETFILE</description>
    <display-name>TRASIN-NETFILE</display-name>
    <servlet-name>NetfileDataServlet</servlet-name>
    <servlet-class>netfile.NetfileDataServlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>NetfileDataServlet</servlet-name>
    <url-pattern>/NetfileDataServlet</url-pattern>
  </servlet-mapping>
 <filter>
  <filter-name>struts2</filter-name>
  <filter-class>
   org.apache.struts2.dispatcher.FilterDispatcher
  </filter-class>
 </filter>
 <filter-mapping>
  <filter-name>struts2</filter-name>
  <url-pattern>/*</url-pattern>
 </filter-mapping>
 <filter>
     <filter-name>struts-cleanup</filter-name>
     <filter-class>org.apache.struts2.dispatcher.ActionContextCleanUp</filter-class>
 </filter>
 <filter-mapping>
     <filter-name>struts-cleanup</filter-name>
     <url-pattern>/*</url-pattern>
 </filter-mapping>
 <filter>
  <filter-name>welcomeFilter</filter-name>
  <filter-class>struts2.action.WelcomeFilter</filter-class>
 </filter>
 <filter-mapping>
  <filter-name>welcomeFilter</filter-name>
  <url-pattern>/welcome.jsp</url-pattern>
 </filter-mapping>
  <welcome-file-list>
    <welcome-file>welcome.jsp</welcome-file>
  </welcome-file-list>
</web-app> 
问题补充：目的是加一个servlet/jsp写的模块。原来的模块是structs的。但是提示好像加了servlet配置，但是被structs的配置给屏蔽了。报错。There is no Action mapped for namespace / and action name NetfileDataServlet.这个应该已经是structs.xml里面的错误了，根本没执行web.xml里面的配置