spring-data-jpa - JPA、Hibernate 验证器 - 电子邮件验证器不适用于 String

Question

我想弄清楚如何在我的 Controller 中验证 DTO

堆:
Spring boot 1.5.4、Spring Data JPA、Hibernate Validation 5、PostgreSQL

问题是我仍然收到有关缺少验证器的异常。

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;
}

Controller

@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

我怀疑您正在使用 Bean Validation 2.0 和 Hibernate Validator 5.4，它只支持 BV 1.1。 @Email 约束在 2.0 中被添加到规范中 - 在此之前，它只是一个 HV 特定约束。

您可能添加了对validation-api 2.0 的依赖。

所以:

要么你回到 BV 1.1，你将需要使用 Hibernate Validator 特定的 @Email 约束(来自包 org.hibernate.validator.constraints)；

或者您将 HV 升级到 6.0(推荐)并保留 BV 2.0 和 javax.validation @Email 约束。