异常处理的用法

全局异常

package com.atguigu.yygh.common.exception;

import com.atguigu.yygh.common.result.Result;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;

@ControllerAdvice

public class GlobalExceptionHandler{

    @ExceptionHandler(Exception.class)
    @ResponseBody
    public Result error(Exception e){
        e.printStackTrace();
        return Result.fail();
    }
    @ExceptionHandler(YyghException.class)
    @ResponseBody
    public Result error(YyghException e){
        e.printStackTrace();
        return Result.fail();
    }
}

自定义异常

package com.atguigu.yygh.common.exception;

import com.atguigu.yygh.common.result.ResultCodeEnum;
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;

/**
 * 自定义全局异常类
 *
 * @author qy
 */
@Data
@ApiModel(value = "自定义全局异常类")
public class YyghException extends RuntimeException {

    @ApiModelProperty(value = "异常状态码")
    private Integer code;

    /**
     * 通过状态码和错误消息创建异常对象
     * @param message
     * @param code
     */
    public YyghException(String message, Integer code) {
        super(message);
        this.code = code;
    }

    /**
     * 接收枚举类型对象
     * @param resultCodeEnum
     */
    public YyghException(ResultCodeEnum resultCodeEnum) {
        super(resultCodeEnum.getMessage());
        this.code = resultCodeEnum.getCode();
    }

    @Override
    public String toString() {
        return "YyghException{" +
                "code=" + code +
                ", message=" + this.getMessage() +
                '}';
    }
}