1.拦截器添加分两步

• 自定义拦截器，实现 HandlerInterceptor 接口
• 自定义类继承WebMvcConfigurationSupport 类，重写 addInterceptors 方法

2.自定义拦截器

自定义拦截器类 MyInterceptor

package com.example.demo;

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

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
/**
 * 自定义拦截器
 * @author LENOVO
 *
 */
public class MyInterceptor  implements HandlerInterceptor{

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
            throws Exception {
        System.out.println("进入拦截器，此处还没有进入controller");
        return HandlerInterceptor.super.preHandle(request, response, handler);
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
            ModelAndView modelAndView) throws Exception {

        System.out.println("进入拦截器，此处已经调用完controller");
        HandlerInterceptor.super.postHandle(request, response, handler, modelAndView);
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
            throws Exception {
        System.out.println("此处是视图渲染成功后调用，一般用于清理");
        HandlerInterceptor.super.afterCompletion(request, response, handler, ex);
    }

}

3.自定义类继承 WebMvcConfigurationSupport类，重写 addInterceptors方法

package com.example.demo;

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;
/**
 * 添加自定义拦截器
 * @author LENOVO
 *
 */
@Configuration
public class MyAppConfig extends WebMvcConfigurationSupport{

    @Override
    protected void addInterceptors(InterceptorRegistry registry) {
        //注册自定义拦截器并且添加拦截路径
        registry.addInterceptor(new MyInterceptor()).addPathPatterns("/*");
        super.addInterceptors(registry);
    }

}

4.结果

完！