Hibernate Validator异常“找不到类型为：java.lang.String的验证器”。 [英] Hibernate Validator exception "No validator could be found for type: java.lang.String."

问题描述

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

我想添加自定义约束验证器，但似乎验证器没有调用并总是得到没有验证器可以找到类型异常。我犯了什么错误吗？
我总是遇到一个很大的问题，它总是得到这个异常：

  javax.validation.UnexpectedTypeException：HV000030：没有验证器可以找到类型为：java.lang.String。在org.hibernate.validator.internal.engine.ConstraintTree.verifyResolveWasUnique（ConstraintTree.java:394）
 
在org.hibernate.validator.internal.engine.ConstraintTree.findMatchingValidatorClass（ConstraintTree.java:375） 
  

但是，如果我删除自定义约束验证程序，则一切正常。
这里是我的代码，你能找到引起这个异常的源代码吗？

  test.constraint.ActorConstraint 
 
 @Target（{ElementType.METHOD，ElementType.FIELD，ElementType.ANNOTATION_TYPE}）
 @Retention（RetentionPolicy.RUNTIME）
 @Documented 
 @Constraint（validatedBy = ActorConstraintValidator.class）
 public @interface ActorConstraint {
 
 String message（）defaultActor已经存在于数据库中; 
 public abstract Class<？> [] groups（）default {}; 
 public abstract Class <？扩展了Payload> [] payload（）default {}; 
 
} 
 
 
 
 test.constraint.ActorConstraintValidator 
 @Component 
公共类ActorConstraintValidator实现ConstraintValidator< ActorConstraint，演员> {
 
 @Autowired 
私人ActorModel actorModel; 
 
 @Override 
 public void initialize（ActorConstraint arg0）{
 System.out.println（ActorConstraintValidator is initialized）; 
 
 $ b @Override 
 public boolean isValid（Actor actor，ConstraintValidatorContext context）{
 
 boolean pass = true; 
 
 if（getActorModel（）。isActorExist（actor.getName（）））{
 pass = false; 
} 
返回通行证; 
} 
 
 
 public ActorModel getActorModel（）{
 return actorModel; 
} 
 
 public void setActorModel（ActorModel actorModel）{
 this.actorModel = actorModel; 
 
 
 
 
 
 test.entity.Actor 
 
 @Entity / *（findByName命名查询定义省略）* / 
 public class Actor实现Serializable {
 
 public static final String NAMED_QUERY__FIND_ACTOR_BY_NAME =findActorByName; 
 
 @Id 
 @GeneratedValue（strategy = GenerationType.IDENTITY）
 private长ID; 
 
 @ActorConstraint 
 @NotEmpty 
私人字符串名称; 
 
 @DateTimeFormat（ISO = ISO.DATE）
私人日期生日; 
 
 @Min（0）
 @Max（300）
私有整数高度; 
 
 ... 
} 
  

额外说明，我有加入

 <豆ID = 验证 类= org.springframework.validation.beanvalidation.LocalValidatorFactoryBean/> 
  

to spring xml

解决方案

您将 @ActorConstraint 放入<$ c $>类型的字段 name c> String ，而验证器类型 ActorConstraintValidator 通过 Actor 进行参数化。也就是说，对于 @ActorConstraint 约束没有验证器，并且输入 String 。

I use Spring and Spring MVC 3.1, Hibernate 3, Hibernate Validator 4.3.

I want to add my custom constraint validator, but it seems that my validator not called and always got "No validator could be found for type" exception. Did I make any mistake? I got a big problem of getting this exception always

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)

But if I remove my custom constraint validator, everything works fine. Here is my code, could you help find the source to cause this exception?

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;

  ...
 }

extra note, I have added

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

to spring xml

解决方案

You put the @ActorConstraint to the field name which is of type String, while the validator type ActorConstraintValidator is parametrized with Actor. That is, there is no validator for the @ActorConstraint constraint and type String.

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