Spring rest控制器参数上的弹簧验证不'；行不通

我有这样的控制器处理程序：

@RequestMapping(method = POST, consumes = MediaType.APPLICATION_JSON_VALUE)
@ApiOperation(value = "Add to basket")
@ApiResponses(value = {@ApiResponse(code = 200, message = "Successfully add to basket")})
@PreAuthorize("@securityService.hasUserAccess()")
public ResponseEntity addToBasket(@RequestBody @ItemAlreadyExistInBasket ProductEntity product) {
    basketService.addToBasket(product);
    return new ResponseEntity(HttpStatus.OK);
}

我的想法是这样的

@项目已存在于邮箱中

从未触发，我不知道为什么。这是带有约束验证的注释

@Target({ METHOD, FIELD, ANNOTATION_TYPE, CONSTRUCTOR, PARAMETER })
@Retention(RUNTIME)
@Documented
@Constraint(validatedBy = ItemAlreadyExistInBasketConstraint.class)
public @interface ItemAlreadyExistInBasket {
    String message() default "Item already exist in basket";

    Class<?>[] groups() default {};

    Class<? extends Payload>[] payload() default {};
}

public class ItemAlreadyExistInBasketConstraint implements ConstraintValidator<ItemAlreadyExistInBasket, ProductEntity> {

    @Autowired
    private BasketRepository basketRepository;

    @Autowired
    private UserRepository userRepository;

    @Override
    public void initialize(ItemAlreadyExistInBasket constraintAnnotation) {

    }

    @Override
    public boolean isValid(ProductEntity productEntity, ConstraintValidatorContext context) {
        userRepository.findByLogin(UserUtil.getAuthenticatedUserName());
        return basketRepository.findByUserAndStatusAndProduct(userRepository.findByLogin(UserUtil.getAuthenticatedUserName()), Status.ACTIVE, productEntity).isEmpty();
    }
}

@Target（{方法、字段、注释\类型、构造函数、参数}）
@保留（运行时）
@记录
@约束（validatedBy=ItemAlreadyExistInBasketConstraint.class）
public@interface ItemAlreadyExistInBasket{
String message（）默认为“篮子中已存在项目”；
类[]组（）默认值{}；
类我最近还必须处理这些方法验证，不知道您是否已经找到了这个问题的答案，但我仍然要回答它

1.创建以下bean（例如在@Configuration类中）：
2.用@Validated注释@RestController
3.实现您的验证器。
正如您在问题中所说的，您可以使用JSR303规范实现验证器

4.处理验证错误
在使用@Value和method validation时，Spring以不同的方式处理验证错误。因此，如果希望方法返回400错误而不是抛出服务器异常，则还需要实现类似于此方法的功能：

/**
 * Handle Constraint exceptions in order to return a bad request http status
 */
@ExceptionHandler(value = { ConstraintViolationException.class })
@ResponseStatus(value = HttpStatus.BAD_REQUEST)
public String handleResourceNotFoundException(ConstraintViolationException e) {
    Set<ConstraintViolation<?>> violations = e.getConstraintViolations();
    StringBuilder strBuilder = new StringBuilder();
    for (ConstraintViolation<?> violation : violations ) {
        strBuilder.append(violation.getMessage() + "\n");
    }
    return strBuilder.toString();
}

/**
*处理约束异常以返回错误的请求http状态
*/
@ExceptionHandler（值={ConstraintViolationException.class}）
@ResponseStatus（值=HttpStatus.BAD_请求）
公共字符串句柄ResourceNotFoundException（ConstraintViolationException e）{
设置
@RestController
@Validated
[...]
public class YourController ...

/**
 * Handle Constraint exceptions in order to return a bad request http status
 */
@ExceptionHandler(value = { ConstraintViolationException.class })
@ResponseStatus(value = HttpStatus.BAD_REQUEST)
public String handleResourceNotFoundException(ConstraintViolationException e) {
    Set<ConstraintViolation<?>> violations = e.getConstraintViolations();
    StringBuilder strBuilder = new StringBuilder();
    for (ConstraintViolation<?> violation : violations ) {
        strBuilder.append(violation.getMessage() + "\n");
    }
    return strBuilder.toString();
}