每个方法都加这段校验太麻烦了

准备做一个统一异常处理@ControllerAdvice

后台代码：

package com.nanjing.gulimall.product.exception;

import com.nanjing.common.exception.BizCodeEnum;
import com.nanjing.common.utils.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.http.HttpStatus;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.bind.annotation.RestControllerAdvice;

import java.util.HashMap;
import java.util.Map;

/**
 * @author zhou
 * @version 1.0
 * @