<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping> 
struts intercepts all requests why static resources can still be accessed
<%@ taglib prefix="s" uri="/struts-tags" %>
<link type="text/css" rel="stylesheet" href="${pageContext.request.contextPath}/css/blue/pageCommon.css"/>
<link rel="stylesheet" href="zTreeStyle/zTreeStyle.css" type="text/css">
<script language="javascript" src="${pageContext.request.contextPath}/js/jquery-1.4.2.js"></script>
<script language="javascript" src="${pageContext.request.contextPath}/js/jquery-ztree-2.5.js"></script>
<script language="javascript" src="${pageContext.request.contextPath}/js/jQuery-plugin-delete.js"></script>