errors.java

    public ValidationResponse createValidationResponse(BindingResult result, boolean translate) {
        ValidationResponse response = new ValidationResponse();
        if(!result.hasErrors()) {
            response.setSuccess(true);
            return response;
        }
        response.setSuccess(false);
        Locale locale = LocaleContextHolder.getLocale();
        for (FieldError error : result.getFieldErrors()) {
            String message = translate ? messageSource.getMessage(error, locale) : error.getCode();
            response.addError(error.getField(), message);
        }
        return response;
    }