基于父Pojo-Spring验证的公共Pojo-Dynamic错误消息

@Component
public class NameofClass implements Validator {

    @Override
    public boolean supports(Class<?> aClass) {
        return DomainClass.class.equals(aClass);
    }

    @Override
    public void validate(Object o, Errors errors) {
        //validation code...
        if (o instanceof DomainClass) {
             // do something...
        }
    }
}

@Override
protected ResponseEntity<Object> handleMethodArgumentNotValid(MethodArgumentNotValidException ex,
        HttpHeaders headers, HttpStatus status, WebRequest request) {

    List<String> errorMessages = new ArrayList<>();

    for(FieldError error : ex.getBindingResult().getFieldErrors()) {
        log.info("FieldName : " + error.getField());
        errorMessages = getAllErrorMessages(errorMessages,error.getField(),error.getDefaultMessage());
    }
    return new ResponseEntity<Object>(errorMessages.toString(), HttpStatus.BAD_REQUEST); 

 }

private List<String> getAllErrorMessages(List<String> errorMessages, String fieldName, String defaultMessage) {

     if(fieldName.contains("Debtor")) {
                errorMessages.add("Debtor "+ defaultMessage);
     }
     else if(fieldName.contains("Creditor")) {
            errorMessages.add("Creditor "+ defaultMessage);
     }
     else {
            errorMessages.add(defaultMessage);
     }
}