public class MyStrutsFilter extends StrutsPrepareAndExecuteFilter {
 public void doFilter(ServletRequest req, ServletResponse res,
   FilterChain chain) {
  HttpServletRequest request = (HttpServletRequest) req;
  String url = request.getRequestURI();
  if (url.contains("ueditor/jsp/")) {<SPAN style="WHITE-SPACE: pre">  </SPAN>//这里是将整个文件夹下的文件都过滤了
   try {
    chain.doFilter(req, res);
   } catch (IOException e) {
    e.printStackTrace();
   } catch (ServletException e) {
    e.printStackTrace();
   }
  } else {
   try {
    super.doFilter(req, res, chain);// 采用默认父类的拦截器，即 struts2
   } catch (IOException e) {
    e.printStackTrace();
   } catch (ServletException e) {
    e.printStackTrace();
   }
  }
 }
}

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0"
 xmlns="http://java.sun.com/xml/ns/javaee"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
 http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
  <display-name></display-name> 
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
    <session-config>   
        <session-timeout>30</session-timeout>   
    </session-config> 
  <filter>
  <filter-name>struts2</filter-name>
  <filter-class> 
        cn.xyx.web.filter.MyStrutsFilter
        <!-- 这里使用自定义拦截器，.jsp不做处理，其他使用默认拦截器 -
         注意这里替换了默认的struts2的 拦截器 org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter -->
    </filter-class>
  </filter>
  <filter-mapping>
  <filter-name>struts2</filter-name>
  <url-pattern>/*</url-pattern>
  </filter-mapping>
  <error-page>
   <error-code>404</error-code>
   <location>/404.jsp</location>
 </error-page>
  </web-app>