SpringBoot:JPA + AuditingEntityListener时区设置方式

SpringBoot:JPA + AuditingEntityListener时区设置方式

目录JPA + AuditingEntityListener时区设置可在应用配置中添加如下配置@EntityListeners(AuditingEntityListener.class)介绍@EntityListenersAuditingEntityListener.class

JPA + AuditingEntityListener时区设置

在SpringBoot项目中，如果应用启用了EnableJpaAuditing并且使用AuditingEntityListener对实体的创建时间、更新时间进行自动审计，可能存在生成时间的时区和系统时区不一致的问题。

可在应用配置中添加如下配置

将时区设定为指定时区：

spring.jpa.properties.hibernate.jdbc.time_zone = GMT+8

@EntityListeners(AuditingEntityListener.class)介绍

@EntityListeners

源码

/**

* Specifies the callback listener classes to be used for an

* entity or mapped superclass. This annotation may be applied

* to an entity class or mapped superclass.

*

* @since java Persistence 1.0

*/

@Target({TYPE})

@Retention(RUNTIME)

public @interface EntityListeners {

/** The callback listener classes */

Class[] value();

}

分析

从源码的注释中可以很清楚的了解到该注解的作用，简单翻译如下：该注解用于指定Entity或者superclass上的回调监听类。该注解可以用于Entity或者superclass上。

AuditingEntityListener.class

源码

/**

* JPA entity listener to capture auditing information on persiting and updating entities. To get this one flying be

* sure you configure it as entity listener in your {@code orm.xml} as follows:

*

*

* <persistence-unit-metadata>

* &lt;persistence-unit-defaults>

* <entity-listeners>

* <entity-listener class="org.springframework.data.jpa.domain.support.AuditingEntityListener" />

* </entity-listeners>

* </persistence-unit-defaults>

* </persistence-unit-metadata>

*

*

* After that it'sxVYmEgyuG just a matter of activating auditing in your Spring config:

*

*

* @Configuration

* @EnableJpaAuditing

* class ApplicationConfig {

*

* }

*

*

*

* <jpa:auditing auditor-aware-ref="yourAuditorAwarebean" />

*

*

* @author Oliver Gierke

* @author Thomas Darimont

*/

@Configurable

public class AuditingEntityListener {

private ObjectFactory handler;

/**

* Configures the {@link AuditingHandler} to be used to set the current auditor on the domain types touched.

*

* @param auditingHandler must not be {@literal null}.

*/

public void setAuditingHandler(ObjectFactory auditingHandler) {

Assert.notNull(auditingHandler, "AuditingHandler must not be null!");

this.handler = auditingHandler;

}

/**

* Sets modification and creation date and auditor on the target object in case it implements {@link Auditable} on

* persist events.

*

* @param target

*/

@PrePersist

public void touchForCreate(Object target) {

if (handler != null) {

handler.getObject().markCreated(target);

}

}

/**

* Sets modification and creation date and auditor on the target object in case it implements {@link Auditable} on

* update events.

*

* @param target

*/

@PreUpdate

public void touchForUpdate(Object target) {

if (handler != null) {

handler.getObject().markModified(target);

}

}

}

分析

同样的从该类的注释也可以了解到该类的作用：这是一个JPA Entity Listener，用于捕获监听信息，当Entity发生持久化和更新操作时。

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