SpringMVC拦截器： 继承 HandlerInterceptor

1、applicationContext.xml

2、MyInterceptor

package com.lan.config;

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

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

public class MyInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //return HandlerInterceptor.super.preHandle(request, response, handler);
        System.out.println("======处理前=========");
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        //HandlerInterceptor.super.postHandle(request, response, handler, modelAndView);
        System.out.println("======处理后=========");
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        //HandlerInterceptor.super.afterCompletion(request, response, handler, ex);
        System.out.println("======清理=========");
    }
}