过滤器、拦截器中重定向无限循环问题解决

package com.bybo.aca.web.interceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

public class Login implements HandlerInterceptor {

    @Override
    public void afterCompletion(HttpServletRequest httpRequest,
            HttpServletResponse httpResponse, Object arg2, Exception arg3)
            throws Exception {
         
    }

    @Override
    public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1,
            Object arg2, ModelAndView arg3) throws Exception {
        

    }

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response,
            Object object) throws Exception {
        /*HttpServletRequest httpRequest = (HttpServletRequest) request;  
         HttpServletResponse httpResponse = (HttpServletResponse) response;*/
        String urlString = request.getRequestURI();
            
        ///olForum/forumList.html模拟登录页
　　　　　//这个地方要做判断不然会无限循环重定向，即执行过滤器、拦截器很多遍
        if(urlString.endsWith("forumList.html")){
            return true;
        }
        //请求的路径
        String contextPath=request.getContextPath();
       
        /*httpRequest.getRequestDispatcher("/olForum/forumList").forward(httpRequest, httpResponse);*/
        /*response.sendRedirect(contextPath+"/olForum/forumList.html");*/
        response.sendRedirect(contextPath + "/olForum/forumList.html?login=aaa");  
        return false;
        /*httpResponse.sendRedirect(httpRequest.getContextPath()+"/olForum/forumList.html");
        return;*/
        

    }

}