springCloud 自定義抛出異常

定義異常枚舉

package com.imooc.product.enums;

import lombok.Getter;

 
@Getter
public enum ResultEnum {

    PRODUCT_NOT_EXIST(1, "商品不存在"),
    PRODUCT_STOCK_ERROR(2, "庫存有誤"),
    ;

    private Integer code;

    private String message;

    ResultEnum(Integer code, String message) {
        this.code = code;
        this.message = message;
    }
}
           

自定義Exception

package com.imooc.product.exception;

import com.imooc.product.enums.ResultEnum;


public class ProductException extends RuntimeException {

    private Integer code;

    public ProductException(Integer code, String message) {
        super(message);
        this.code = code;
    }

    public ProductException(ResultEnum resultEnum) {
        super(resultEnum.getMessage());
        this.code = resultEnum.getCode();
    }
}
           

調用

//判斷商品是否存在
            if (!productInfoOptional.isPresent()){
                throw new ProductException(ResultEnum.PRODUCT_NOT_EXIST);
            }