Spring JPA@EntityListener未按预期工作

我正在集成Spring4和Hibernate5，但有一个问题我无法解决。 我在BaseEntity类上使用@EntityListener注释，该类是其他业务模型的超类。 我还在BaseEntity上使用@MappedSuperclass。 但它不起作用

使用SpringBase注释并成功运行应用程序。 我还向db插入了一条记录。 所以我认为我的项目配置是最新的

有人告诉我为什么吗？ 非常感谢

这是BaseEntity类

@MappedSuperclass
@EntityListeners(EntityListener.class)
public class BaseEntity implements Serializable {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    @Column(nullable = false, updatable = false)
    private Date createDate;

    @Column(nullable = false)
    private Date modifyDate;

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public Date getCreateDate() {
        return createDate;
    }

    public void setCreateDate(Date createDate) {
        this.createDate = createDate;
    }

    public Date getModifyDate() {
        return modifyDate;
    }

    public void setModifyDate(Date modifyDate) {
        this.modifyDate = modifyDate;
    }
}

@MappedSuperclass
public class BaseEntity implements Serializable {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    @Column(nullable = false, updatable = false)
    private Date createDate;

    @Column(nullable = false)
    private Date modifyDate;

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public Date getCreateDate() {
        return createDate;
    }

    public void setCreateDate(Date createDate) {
        this.createDate = createDate;
    }

    public Date getModifyDate() {
        return modifyDate;
    }

    public void setModifyDate(Date modifyDate) {
        this.modifyDate = modifyDate;
    }
}

这是EntityListener类

public class EntityListener {

  @PrePersist
  public void prePersist(BaseEntity entity) {
    entity.setCreateDate(new Date());
    entity.setModifyDate(new Date());
  }

  @PreUpdate
  public void preUpdate(BaseEntity entity) {
    entity.setModifyDate(new Date());
  }

}

public class EntityListener implements PreInsertEventListener, PreUpdateEventListener {

    private static final String CREATE_DATE_PROPERTY = "createDate";

    private static final String MODIFY_DATE_PROPERTY = "modifyDate";

    @Override
    public boolean onPreInsert(PreInsertEvent event) {

        if (event.getEntity() instanceof BaseEntity){
            //property name of entity
            String[] propertyNames = event.getPersister().getEntityMetamodel().getPropertyNames();
            //property value of entity
            Object[] state = event.getState();
            for (int i = 0; i < propertyNames.length ; i ++) {
                if (CREATE_DATE_PROPERTY.equals(propertyNames[i]) || MODIFY_DATE_PROPERTY.equals(propertyNames[i])){
                    state[i] = new Date();
                }
            }
        }

        return false;
    }

    @Override
    public boolean onPreUpdate(PreUpdateEvent event) {

        if (event.getEntity() instanceof BaseEntity){
            //property name of entity
            String[] propertyNames = event.getPersister().getEntityMetamodel().getPropertyNames();
            //property value of entity
            Object[] state = event.getState();
            for (int i = 0; i < propertyNames.length ; i ++) {
                if (MODIFY_DATE_PROPERTY.equals(propertyNames[i])){
                    state[i] = new Date();
                }
            }
        }

        return false;
    }
}

下面是我基于Spring注释的项目配置

@Configuration
@EnableWebMvc
//@ImportResource({ "classpath:xxxxx.xml" })
@PropertySources({
    @PropertySource("classpath:application.properties")
})
@ComponentScan({"com.yeager.admin.persistence","com.yeager.admin.web","com.yeager.admin.service","com.yeager.admin.common"})
@EnableAspectJAutoProxy
//@EnableRetry
public class AppConfig {

    @Bean(name = "multipartResolver")
    public CommonsMultipartResolver getResolver() throws IOException {
        CommonsMultipartResolver resolver = new CommonsMultipartResolver();
        return resolver;
    }

    @Bean
    public static PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer() {
        return new PropertySourcesPlaceholderConfigurer();
    }

    @Bean
    public static SpringContext springContext() {
        return new SpringContext();
    }

}

DAL的主要配置如下：

@Configuration
@EnableTransactionManagement
@PropertySource({"classpath:persistence-mysql.properties"})
public class PersistenceConfig {

    @Autowired
    private Environment env;

    public PersistenceConfig() {
        super();
    }

    @Bean
    public LocalSessionFactoryBean sessionFactory() {

        final LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
        sessionFactory.setDataSource(dataSource());
        sessionFactory.setPackagesToScan("com.yeager.admin.persistence.entity");
        sessionFactory.setHibernateProperties(hibernateProperties());


        return sessionFactory;
    }

    @Bean
    public DataSource dataSource() {
        ComboPooledDataSource comboPooledDataSource = new ComboPooledDataSource();
        try {
            comboPooledDataSource.setDriverClass(env.getProperty("jdbc.driver"));
        } catch (PropertyVetoException e) {
            e.printStackTrace();
        }
        comboPooledDataSource.setJdbcUrl(env.getProperty("jdbc.url"));
        comboPooledDataSource.setUser(env.getProperty("jdbc.username"));
        comboPooledDataSource.setPassword(env.getProperty("jdbc.password"));
        comboPooledDataSource.setInitialPoolSize(Integer.valueOf(env.getProperty("datasource.pool.initialPoolSize")));

        return comboPooledDataSource;
    }

    @Bean
    public PlatformTransactionManager transactionManager() {
        final HibernateTransactionManager transactionManager = new HibernateTransactionManager();
        transactionManager.setSessionFactory(sessionFactory().getObject());
        return transactionManager;
    }

    @Bean
    public PersistenceExceptionTranslationPostProcessor exceptionTranslation() {
        return new PersistenceExceptionTranslationPostProcessor();
    }

    private final Properties hibernateProperties() {

        final Properties hibernateProperties = new Properties();

        hibernateProperties.setProperty("hibernate.dialect", env.getProperty("hibernate.dialect"));
        hibernateProperties.setProperty("hibernate.show_sql", env.getProperty("hibernate.show_sql"));
        hibernateProperties.setProperty("hibernate.generate_statistics",env.getProperty("hibernate.generate_statistics"));
        hibernateProperties.setProperty("hibernate.jdbc.fetch_size", env.getProperty("hibernate.jdbc.fetch_size"));
        hibernateProperties.setProperty("hibernate.jdbc.batch_size", env.getProperty("hibernate.jdbc.batch_size"));
        hibernateProperties.setProperty("hibernate.max_fetch_depth", env.getProperty("hibernate.max_fetch_depth"));
        hibernateProperties.setProperty("hibernate.cache.use_second_level_cache",env.getProperty("hibernate.cache.use_second_level_cache"));
        hibernateProperties.setProperty("hibernate.cache.use_query_cache",env.getProperty("hibernate.cache.use_query_cache"));
//      hibernateProperties.setProperty("hibernate.cache.provider_class",env.getProperty("hibernate.cache.provider_class"));
        hibernateProperties.setProperty("hibernate.hbm2ddl.auto", "update");

        return hibernateProperties;
    }

}

我使用Hibernate的LocalSessionFactoryBean类，而不是JPA的EntityManager类。我想知道这是否是原因？

---------------6.19--------------

我错了。我不应该在SpringLocalSessionFactoryBean类上使用@EntityListener注释基。 对于hibernate5，有一种特殊的配置方式。 现在，我修改我的代码如下：

@Component
public class EntityEventListener {

    @Autowired
    private SessionFactory sessionFactory;

    @PostConstruct
    public void registerListeners(){
        EventListenerRegistry eventListenerRegistry = ((SessionFactoryImplementor) sessionFactory).getServiceRegistry().getService(EventListenerRegistry.class);
        eventListenerRegistry.prependListeners(EventType.PRE_INSERT, PreInsertEntityListener.class);
    }

}

预插入侦听器

public class PreInsertEntityListener implements PreInsertEventListener {
    @Override
    public boolean onPreInsert(PreInsertEvent event) {
//        if (event.getEntity() instanceof AdminUser){
//            ((AdminUser) event.getEntity()).setCreateDate(new Date());
//            ((AdminUser) event.getEntity()).setModifyDate(new Date());
//        }
        BaseEntity baseEntity = (BaseEntity) event.getEntity();
        baseEntity.setCreateDate(new Date());
        baseEntity.setModifyDate(new Date());
        return false;
    }
}

但是，我还有一个问题。 我阅读了hibernate文档并搜索了很多关于这个的信息。插入实体数据时，我的代码已不起作用

---

请帮帮我，谢谢

尽管您既没有发布具体/派生实体，也没有发布业务代码来持久化它，但您发布的代码似乎是正确的

为了给它一个小测试，我向超类添加了一个生成的UID，并创建了一个具体的实体：

import javax.persistence.Entity;

@Entity
public class DerivedEntity extends BaseEntity {

    private static final long serialVersionUID = -6441043639437893962L;

}

既然您提到了Spring，这里有一个Spring数据JPA存储库来保存它：

import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;

@Repository
public interface DerivedEntityRepository extends CrudRepository<DerivedEntity, Long> {

}

更重要的是，如果您不想在将来增强您的自定义侦听器，那么现有的Spring数据JPA正是您目前正在做的（甚至更多）。在这种情况下，您可以使用

@EnableJpaAuditing

增强

@Configuration

类，并修改

BaseEntity

，如下所示：

@MappedSuperclass
@EntityListeners(AuditingEntityListener.class)
public class BaseEntity implements Serializable {

    // ...

    @CreatedDate
    @Column(nullable = false, updatable = false)
    private Date createDate;

    @LastModifiedDate
    @Column(nullable = false)
    private Date modifyDate;

    // ...
}

这将使您的自定义

EntityListener

变得可有可无

---

只需查看更多信息。如果您想使用Hibernate增强审计功能，请尝试。

非常感谢大家。我已经解决了这个问题。 我将分享我的解决方案，希望如果你做同样的事情，它对你有帮助

首先，我的出发点是错误的。因为我以前使用过JPA，所以在集成Spring4和Hibernate5时默认使用@EntityListener注释。 然后，我阅读了Hibernate文档和许多相关文章，发现有一种实现实体侦听器的新方法

最后，我的解决方案如下

这是我的BaseEntity类

@MappedSuperclass
@EntityListeners(EntityListener.class)
public class BaseEntity implements Serializable {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    @Column(nullable = false, updatable = false)
    private Date createDate;

    @Column(nullable = false)
    private Date modifyDate;

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public Date getCreateDate() {
        return createDate;
    }

    public void setCreateDate(Date createDate) {
        this.createDate = createDate;
    }

    public Date getModifyDate() {
        return modifyDate;
    }

    public void setModifyDate(Date modifyDate) {
        this.modifyDate = modifyDate;
    }
}

@MappedSuperclass
public class BaseEntity implements Serializable {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    @Column(nullable = false, updatable = false)
    private Date createDate;

    @Column(nullable = false)
    private Date modifyDate;

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public Date getCreateDate() {
        return createDate;
    }

    public void setCreateDate(Date createDate) {
        this.createDate = createDate;
    }

    public Date getModifyDate() {
        return modifyDate;
    }

    public void setModifyDate(Date modifyDate) {
        this.modifyDate = modifyDate;
    }
}

首先，您需要定义EntityListener类

public class EntityListener {

  @PrePersist
  public void prePersist(BaseEntity entity) {
    entity.setCreateDate(new Date());
    entity.setModifyDate(new Date());
  }

  @PreUpdate
  public void preUpdate(BaseEntity entity) {
    entity.setModifyDate(new Date());
  }

}

public class EntityListener implements PreInsertEventListener, PreUpdateEventListener {

    private static final String CREATE_DATE_PROPERTY = "createDate";

    private static final String MODIFY_DATE_PROPERTY = "modifyDate";

    @Override
    public boolean onPreInsert(PreInsertEvent event) {

        if (event.getEntity() instanceof BaseEntity){
            //property name of entity
            String[] propertyNames = event.getPersister().getEntityMetamodel().getPropertyNames();
            //property value of entity
            Object[] state = event.getState();
            for (int i = 0; i < propertyNames.length ; i ++) {
                if (CREATE_DATE_PROPERTY.equals(propertyNames[i]) || MODIFY_DATE_PROPERTY.equals(propertyNames[i])){
                    state[i] = new Date();
                }
            }
        }

        return false;
    }

    @Override
    public boolean onPreUpdate(PreUpdateEvent event) {

        if (event.getEntity() instanceof BaseEntity){
            //property name of entity
            String[] propertyNames = event.getPersister().getEntityMetamodel().getPropertyNames();
            //property value of entity
            Object[] state = event.getState();
            for (int i = 0; i < propertyNames.length ; i ++) {
                if (MODIFY_DATE_PROPERTY.equals(propertyNames[i])){
                    state[i] = new Date();
                }
            }
        }

        return false;
    }
}

---

我遇到了同样的问题，在我的例子中，用@EntityListeners定义的侦听器引用了另一个包中的类（不在同一个类加载器中），并且没有被扫描。将类添加到我的持久性上下文后，它开始按预期工作

---

因此，请始终确保将与持久性相关的任何类添加到持久性上下文中。

您能将相关代码粘贴到此处吗？你说的“不起作用”是什么意思？您的侦听器回调是否未被调用？确定。我将粘贴BaseEntity类和EntityListener类。但如果我想使用JPA@EntityListeners注释基Hibernate，我应该怎么做？也许我不想集成Spring数据JPA。嗨，Kevin，我一分钟前读过Spring JPA审计和Hibernate Envers。我认为，在实体创建、删除和更新时，让监听器成为监听器不是我的观点。我确信我应该使用@EntityListeners注释来实现。你能帮我吗？非常感谢。我添加了有关Spring配置的更多信息。这对你很有帮助。看来你自己解决了问题。这也许是最好的办法。但我很高兴我能帮上一点忙。：）所以你最后说注释不起作用，是吗？它是否依赖于JPA或spring（启动）版本？