错误：找不到类型的验证程序：java.time.LocalDate [英] error: No validator could be found for type: java.time.LocalDate
问题描述
我正在开发一个使用bean验证的项目（Hibernate Validator 5.1.3.Final）。我的bean有一个 @Past 注释的属性。
I'm working on a project that uses bean validation (Hibernate Validator 5.1.3.Final). My bean has a attribute with the @Past annotation.
@Past(message = "A data deve estar no passado.")
private LocalDate dataAbertura;
但是，当验证发生时，我得到以下异常：
But, when the validation occurs I get the following exception:
21:46:12,424 ERROR [io.undertow.request] (default task-35) UT005023: Exception handling request to /financeiro/clientes/pessoafisica: javax.servlet.ServletException: javax.validation.UnexpectedTypeException: HV000030: No validator could be found for type: java.time.LocalDate.
at br.com.caelum.vraptor.VRaptor.doFilter(VRaptor.java:127) [vraptor-4.1.4.jar:]
at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:60) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:132) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
at io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:85) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:61) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:56) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:45) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:63) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:58) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:70) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
at io.undertow.security.handlers.SecurityInitialHandler.handleRequest(SecurityInitialHandler.java:76) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:261) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:247) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:76) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:166) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
at io.undertow.server.Connectors.executeRootHandler(Connectors.java:197) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:759) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [rt.jar:1.8.0_25]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [rt.jar:1.8.0_25]
at java.lang.Thread.run(Thread.java:745) [rt.jar:1.8.0_25]
Caused by: javax.validation.UnexpectedTypeException: HV000030: No validator could be found for type: java.time.LocalDate.
at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintValidatorManager.verifyResolveWasUnique(ConstraintValidatorManager.java:218) [hibernate-validator-5.1.3.Final.jar:5.1.3.Final]
at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintValidatorManager.findMatchingValidatorClass(ConstraintValidatorManager.java:193) [hibernate-validator-5.1.3.Final.jar:5.1.3.Final]
at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintValidatorManager.getInitializedValidator(ConstraintValidatorManager.java:97) [hibernate-validator-5.1.3.Final.jar:5.1.3.Final]
at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateConstraints(ConstraintTree.java:125) [hibernate-validator-5.1.3.Final.jar:5.1.3.Final]
怎么了？ Hibernate Validator不支持LocalDate吗？
What's wrong? Hibernate Validator doesn't support LocalDate?
推荐答案
实际上要引用的问题是 HV-874 。 Hibernate Validator 5.2.x确实添加了对某些新Java 8日期/时间类型的支持。在这种情况下，我应该强调一些。特别是 LocalDate 不受支持。 LocalDate 的Javadocs说：
Actually the issue to refer to is HV-874. Hibernate Validator 5.2.x does add support for some of the new Java 8 date/time types. I should stress "some" in this context. In particular LocalDate is not supported. The Javadocs of LocalDate says:
此类不存储或代表时间或时区。相反，
它是日期的描述，用于生日。它不能
代表时间线上的瞬间，没有附加信息
，例如偏移或时区。
This class does not store or represent a time or time-zone. Instead, it is a description of the date, as used for birthdays. It cannot represent an instant on the time-line without additional information such as an offset or time-zone.
如果没有时间轴上的瞬间，则无法确定给定日期是在部分还是将来。首先通过附加时区，可以说明并回答这个问题。
Without an instant on the timeline it is not possible to say if a given date is in the part or future. First by attaching a timezone it would be possible to state and answer this question.
如果您仍然认为在您的用例中使用 @Future LocalDate 的约束你可以随时实现自己的 ConstraintValidator for LocalDate 并使用约束定义元素通过XML注册在约束映射文件中，如此处所示。
If you still think it makes sense in your use case to use the Past and @Future constraints for LocalDate you can always implement your own ConstraintValidator for LocalDate and register it via XML using a constraint-definition element in a constraint mapping file as seen here.
如果您使用的是Hibernate Validator 5.2，您还可以使用Java ServiceLoader方法注册其他 ConstraintValidator 实现 - 请参阅 ConstraintDefinitionContributor 。后者现在是Hibernate Validator特有的功能。
If you are using Hibernate Validator 5.2, you can also use the Java ServiceLoader approach to register additional ConstraintValidator implementations - see ConstraintDefinitionContributor. The latter is for now a Hibernate Validator specific feature.
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