Spring的拦截器和监听器

拦截器代码如下：

package com.mengyao.shops.interceptor;

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

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

public class ShopInterceptor extends HandlerInterceptorAdapter {

    private Logger logger = LoggerFactory.getLogger(ShopInterceptor.class);

    
    @Override
    public void afterCompletion(HttpServletRequest request,
            HttpServletResponse response, Object handler, Exception ex)
            throws Exception {
        super.afterCompletion(request, response, handler, ex);
    }

    /**
     * Request结束后执行（Controller执行完成后）
     */
    @Override
    public void postHandle(HttpServletRequest request,
            HttpServletResponse response, Object handler,
            ModelAndView modelAndView) throws Exception {
        logger.info("==== {} ====", response.getStatus());
        super.postHandle(request, response, handler, modelAndView);
    }

    /**
     * Request的预处理（Controller之前执行）
     */
    @Override
    public boolean preHandle(HttpServletRequest request,
            HttpServletResponse response, Object handler) throws Exception {
        String userAddr = request.getRemoteAddr();  
        String url = request.getRequestURL().toString();
        logger.info("==== [userAddr:{}\t访问:{}] ====", userAddr, url);
        return true;
    }

}

监听器代码如下：

package com.mengyao.shops.listener;

import org.springframework.context.ApplicationListener;
import org.springframework.context.event.ContextRefreshedEvent;

public class InitListener implements ApplicationListener<ContextRefreshedEvent>  {

    @Override
    public void onApplicationEvent(ContextRefreshedEvent event) {
        if(event.getApplicationContext().getParent() == null){
            //获取到父容器，即顶级容器
        }
    }

}