下面是我的简单的传感器配准控制器方法。

@PostMapping("/registration")
    public ResponseEntity<HttpStatus> create(@RequestBody @Valid SensorDTO sensorDTO,
                                             BindingResult bindingResult){
        //This one responses with null value !
        sensorValidator.validate(convertToSensor(sensorDTO), bindingResult);

        if (bindingResult.hasErrors()){
            StringBuilder errorMessage = new StringBuilder();
            List<FieldError> errors = bindingResult.getFieldErrors();
            for (FieldError error : errors){
                errorMessage
                        .append(error.getDefaultMessage());
            }
            throw new SensorNotCreatedException(errorMessage.toString());
        }
        sensorService.save(convertToSensor(sensorDTO));
        return ResponseEntity.ok(HttpStatus.OK);
    }

传感器验证类。这里我认为.rejectvalue（）方法有问题。

@Component
public class SensorValidator implements Validator {

    private final SensorService sensorService;

    @Autowired
    public SensorValidator(SensorService sensorService) {
        this.sensorService = sensorService;
    }

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

    @Override
    public void validate(Object target, Errors errors) {
        Sensor sensor = (Sensor) target;
        if (sensorService.getName(sensor.getName()).isPresent())
            errors.rejectValue("name","45234","This name is already taken");

    }
}

如果我试图创建双值，则响应如下

{
    "message": null,
    "timestamp": 1678379316410
}

responce值必须从.rejectvalue（）方法中给予我默认的错误消息，我已经尝试了所有的错误方法。此外，如果我创建了一个空名称的传感器，它会传递它，即使我写了@Size（min=1）和@NotEmpty注解。所以我归咎于bindingresult-这个类有问题
如果我将绑定结果打印到控制台，会发生什么情况
org.springframework.validation.BeanPropertyBindingResult: 1 errors Field error in object 'sensorDTO' on field 'name': rejected value [Mega Cool sensor]; codes [45234.sensorDTO.name,45234.name,45234.java.lang.String,45234]; arguments []; default message [This name is already taken]
这个默认消息我正试图得到我的json响应