Hibernate Validator异常"找不到类型为:java.lang.String的验证器."

Question

我使用Spring和Spring MVC 3.1,Hibernate 3,Hibernate Validator 4.3.

我想添加我的自定义约束验证器,但似乎我的验证器没有被调用,并且总是得到"找不到类型的验证器"异常.我犯了什么错吗？总是遇到这个例外我遇到了很大的问题

javax.validation.UnexpectedTypeException: HV000030: No validator could be found for type: java.lang.String.
    at org.hibernate.validator.internal.engine.ConstraintTree.verifyResolveWasUnique(ConstraintTree.java:394)
    at org.hibernate.validator.internal.engine.ConstraintTree.findMatchingValidatorClass(ConstraintTree.java:375)

但是,如果我删除我的自定义约束验证器,一切正常.这是我的代码,你能帮忙找到导致这个异常的来源吗？

test.constraint.ActorConstraint

@Target({ElementType.METHOD, ElementType.FIELD, ElementType.ANNOTATION_TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Constraint(validatedBy=ActorConstraintValidator.class)
public @interface ActorConstraint {

  String message() default "Actor already exists in database";
  public abstract Class<?>[] groups() default {};
  public abstract Class<? extends Payload>[] payload() default {};

}



test.constraint.ActorConstraintValidator
@Component
public class ActorConstraintValidator implements ConstraintValidator<ActorConstraint, Actor> {

  @Autowired
  private ActorModel actorModel;

  @Override
  public void initialize(ActorConstraint arg0) {
    System.out.println("ActorConstraintValidator is initialized");
  }

  @Override
  public boolean isValid(Actor actor, ConstraintValidatorContext context) {

    boolean pass = true;

    if (getActorModel().isActorExist(actor.getName()) ){
      pass = false;
    }
    return pass;
  }


  public ActorModel getActorModel() {
    return actorModel;
  }

  public void setActorModel(ActorModel actorModel) {
    this.actorModel = actorModel;
  }  
}



test.entity.Actor

@Entity  /*(findByName named query definition is omitted)*/
public class Actor implements Serializable {

  public static final String NAMED_QUERY__FIND_ACTOR_BY_NAME = "findActorByName";

  @Id
  @GeneratedValue(strategy = GenerationType.IDENTITY)
  private Long id;

  @ActorConstraint
  @NotEmpty
  private String name;

  @DateTimeFormat(iso=ISO.DATE)
  private Date birthday;

  @Min(0)
  @Max(300)
  private Integer height;

  ...
 }

额外的说明,我补充说

<bean id="validator" class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean"/>

弹簧xml

Answer 1

您@ActorConstraint将该字段放入name类型的字段String,而验证器类型ActorConstraintValidator是参数化的Actor.也就是说,没有@ActorConstraint约束和类型的验证器String.