使Struts2与Servlet并存解决办法

   <filter>
                <filter-name>JSONRPCServlet</filter-name>
                <filter-class>filters.ReDispatcherFilter</filter-class>
                <init-param>
                        <param-name>includeServlets</param-name>
                        <param-value>JRPC</param-value>
                        <!--注:JRPC为下文配置的Servlet JSONRPCServlet过滤的请求配置 -->
                </init-param>
        </filter>
        <filter-mapping>
                <filter-name>JSONRPCServlet</filter-name>
                <url-pattern>/*</url-pattern>
        </filter-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>*.action</url-pattern>
        </filter-mapping>
        
        <filter-mapping>
                <filter-name>struts2</filter-name>
                <url-pattern>/*</url-pattern>
        </filter-mapping>
        
        <!--注：这里同样需要Servlet配置，Filter会转到该Servlet上-->       
        <servlet>
                <servlet-name>JSONRPCServlet</servlet-name>
                <servlet-class>
                        jcore.jsonrpc.servlet.JSONRPCServlet
                </servlet-class>
                <load-on-startup>2</load-on-startup>
        </servlet>
        <servlet-mapping>
                <servlet-name>JSONRPCServlet</servlet-name>
                <url-pattern>/JRPC</url-pattern>
        </servlet-mapping>

package filters;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;

public class ReDispatcherFilter implements Filter {

        public void destroy() {
                // TODO Auto-generated method stub

        }

        public void doFilter(ServletRequest req, ServletResponse resp,
                        FilterChain chain) throws IOException, ServletException {

                HttpServletRequest request = (HttpServletRequest) req;
                String target = request.getRequestURI();
                target = target.lastIndexOf("?") > 0 ? target.substring(target
                                .lastIndexOf("/") + 1, target.lastIndexOf("?")
                                - target.lastIndexOf("/")) : target.substring(target
                                .lastIndexOf("/") + 1);

                //System.out.println(target);
                if (this.includes.contains(target)) {
                        RequestDispatcher rdsp = request.getRequestDispatcher(target);

                        //System.out.println("go..............." + rdsp);
                        rdsp.forward(req, resp);
                } else
                        chain.doFilter(req, resp);
        }

        private ArrayList<String> includes = new ArrayList<String>();

        public void init(FilterConfig config) throws ServletException {

                this.includes.addAll(Arrays.asList(config.getInitParameter(
                                "includeServlets").split(",")));

        }

}