自定义返回异常信息给前端，或者直接用框架里面的RuntimeException

//自定义返回异常信息给前端
public class test2 {
    //抛出异常 main
    @Test
    public void test3() {
        //自定义返回异常信息给前端
        throw new SaasNetworkException(SaasExceptionCode.BRAND_NOT_EXITS);
    }

}

//1 SaasNetworkException
class SaasNetworkException extends AbstractLegoException {

    public SaasNetworkException(IExceptionResult result) {
        super(result);
    }
}

//2 AbstractLegoException--->common服务
/**

 * 自定义异常

@Data
public abstract class AbstractLegoException extends RuntimeException {

     //异常状态码
    private int code;

     //返回用户错误信息
    private String message;

    public AbstractLegoException(IExceptionResult result) {
        super(result.getMsg());
        this.code = result.getCode();
        this.message = result.getMsg();
    }

    public AbstractLegoException(IExceptionResult result, Throwable throwable) {
        super(result.getMsg(), throwable);
        this.code = result.getCode();
        this.message = result.getMsg();
    }
}
 */


//3 IExceptionResult--->common
/**
 *
 public interface IExceptionResult {
 int getCode();

 String getMsg();
 }
 */
//4 enum SaasExceptionCode
enum SaasExceptionCode implements IExceptionResult {


    BRAND_NOT_EXITS(1008, "品牌数据不存在"),

    ;

    /**
     * code
     */
    private int code;
    /**
     * msg
     */
    private String msg;

    SaasExceptionCode(int code, String msg) {
        this.code = code;
        this.msg = msg;
    }

    @Override
    public int getCode() {
        return code;
    }

    @Override
    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }
}

或者直接用框架里面的RuntimeException

if (min == null) {
            throw new RuntimeException("输入参数错误, atv.min is null");
        }