Interceptor 拦截器

import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

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

/**
 * @Author: zanglikun
 * @Date: 2022/5/7 18:43
 * @Description: 拦截器，实现HandlerInterceptor，然后重写方法
 */
@Slf4j
@Configuration
public class MyInterceptor implements HandlerInterceptor {
    // 请求拦截前处理
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        // 请求进来，会被拦截，这里可做日志打印，可获取所有请求参数。返回true 代表放行 返回false 代表拒绝请求。
        return HandlerInterceptor.super.preHandle(request, response, handler);
    }

    //  Controller已经处理完毕了
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        HandlerInterceptor.super.postHandle(request, response, handler, modelAndView);
    }

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