Java统一异常处理技巧分享

@ControllerAdvice
public class GlobalExceptionHandler {

    @ExceptionHandler(BusinessException.class)
    public ResponseEntity handleBusinessException(BusinessException e) {
        ErrorResponse error = new ErrorResponse("BUSINESS_ERROR", e.getMessage());
        return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(error);
    }

    @ExceptionHandler(NotFoundException.class)
    public ResponseEntity handleNotFoundException(NotFoundException e) {
        ErrorResponse error = new ErrorResponse("NOT_FOUND", e.getMessage());
        return ResponseEntity.status(HttpStatus.NOT_FOUND).body(error);
    }

    @ExceptionHandler(Exception.class)
    public ResponseEntity handleUnexpectedException(Exception e) {
        ErrorResponse error = new ErrorResponse("INTERNAL_ERROR", "系统内部错误");
        // 记录详细日志
        log.error("未预期异常：", e);
        return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(error);
    }
}

{
  "code": "BUSINESS_ERROR",
  "message": "用户名已存在",
  "timestamp": "2024-04-05T10:00:00"
}