java自定义的异常类

java自定义的异常类

1、自定义异常类，需要继承 RuntimeException

@Data
public class EmployeeCheckException extends RuntimeException
{
    private int code;

    private String msg;

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

    public EmployeeCheckException(String msg)
    {
        this.code = DATA_PARAM_FAIL_CODE;
        this.msg = msg;
    }
}

　　

2、和全局异常放在一起

@RestControllerAdvice
@Slf4j
public class GlobalExceptionHandler
{

    /**
     * 异常处理方法,可以自定义异常
     * @param request 请求
     * @param e       异常
     * @return  错误提醒
     */
    @ResponseBody
    @ExceptionHandler(value = Exception.class)
    public String defaultErrorHandler(HttpServletRequest request, Exception e)
    {
        //输入参数不满足约束
        if(e instanceof MethodArgumentNotValidException)
        {
            e.printStackTrace();
            BindingResult result = ((MethodArgumentNotValidException) e).getBindingResult();
            return ResponseJsonUtil.returnJson(result.getAllErrors().get(0).getDefaultMessage(), PsiInfo.BAD_REQUEST.code);
        }
        else if(e instanceof IllegalArgumentException)
        {
            e.printStackTrace();
            return ResponseJsonUtil.returnJson(e.getMessage(), PsiInfo.BAD_REQUEST.code);
        }
        else if(e instanceof EmployeeCheckException)
        {
            return ResponseJsonUtil.returnJson(((EmployeeCheckException)e).getMsg(), ((EmployeeCheckException) e).getCode());
        }
        else
        {
            e.printStackTrace();
            return ResponseJsonUtil.returnJson(PsiInfo.ERROR.name, PsiInfo.ERROR.code);
        }
    }
}