JPA，Hibernate验证程序-电子邮件验证程序不适用于String

Question

我正在尝试找出如何在控制器中验证DTO

堆栈：Spring boot 1.5.4，Spring Data JPA，Hibernate Validation 5，PostgreSQL

问题是我仍然遇到有关缺少验证器的异常情况。

有什么线索吗？

javax.validation.UnexpectedTypeException: HV000030: No validator could be found for constraint 'javax.validation.constraints.Email' validating type 'java.lang.String'. Check configuration for 'email'
    at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.throwExceptionForNullValidator(ConstraintTree.java:227) ~[hibernate-validator-5.4.1.Final.jar:5.4.1.Final]
    at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.getConstraintValidatorNoUnwrapping(ConstraintTree.java:308) ~[hibernate-validator-5.4.1.Final.jar:5.4.1.Final]
    at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.getConstraintValidatorInstanceForAutomaticUnwrapping(ConstraintTree.java:242) ~[hibernate-validator-5.4.1.Final.jar:5.4.1.Final]
    at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.getInitializedConstraintValidator(ConstraintTree.java:163) ~[hibernate-validator-5.4.1.Final.jar:5.4.1.Final]
    at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateConstraints(ConstraintTree.java:116) ~[hibernate-validator-5.4.1.Final.jar:5.4.1.Final]
    at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateConstraints(ConstraintTree.java:87) ~[hibernate-validator-5.4.1.Final.jar:5.4.1.Final]
    at org.hibernate.validator.internal.metadata.core.MetaConstraint.validateConstraint(MetaConstraint.java:73) ~[hibernate-validator-5.4.1.Final.jar:5.4.1.Final]
    at org.hibernate.validator.internal.engine.ValidatorImpl.validateMetaConstraint(ValidatorImpl.java:616) ~[hibernate-validator-5.4.1.Final.jar:5.4.1.Final]

DTO

public class CreateUserDto {

    @NotEmpty
    private String name;

    @Email
    @NotEmpty
    private String email;

    private String password;

    private String address;

    private String phone;

    @NotNull
    private Role role;
}

控制者

@PostMapping(value = "/users", consumes = MediaType.APPLICATION_JSON_VALUE)
@ResponseBody
@ResponseStatus(HttpStatus.CREATED)
public UserDto register(@Valid @RequestBody CreateUserDto user) {
    return userService.register(user);
}

Answer 1

我怀疑您正在将Bean Validation 2.0与仅支持BV 1.1的Hibernate Validator 5.4一起使用。@Email约束是在2.0中添加到规范中的-在此之前，它只是HV特定的约束。

您可能已向Validation-api 2.0添加了依赖项。

所以：

• 回到BV 1.1，然后需要使用特定于Hibernate Validator的@Email约束（来自org.hibernate.validator.constraints包）；
• 或将HV升级到6.0（推荐），并保留BV 2.0和javax.validation @Email约束。