java - JPA 2.1/Hibernate 4.3 弃用警告

Question

我正在使用 JPA 2.1 示例应用程序和 Hibernate 4.3.x 实现。

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence
                                http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
    <persistence-unit name="unit1">

        <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
        <class>net.roseindia.model.Product</class>
        <properties>
            <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>
            <property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/common"/>
            <property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/>
            <property name="hibernate.connection.username" value="root"/>
            <property name="hibernate.connection.password" value="root"/>
            <property name="hibernate.show_sql" value="true"/>
            <property name="hibernate.format_sql" value="true"/>
        </properties>

    </persistence-unit>
</persistence>

在 pom.xml 中，我有以下依赖项。

<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-entitymanager</artifactId>
    <version>4.3.5.Final</version>
</dependency>

示例命令行应用程序正常工作(非常简单)但是当我启动它时收到以下警告消息。

Apr 13, 2014 1:12:43 PM org.hibernate.ejb.HibernatePersistence logDeprecation
WARN: HHH015016: Encountered a deprecated javax.persistence.spi.PersistenceProvider [org.hibernate.ejb.HibernatePersistence]; use [org.hibernate.jpa.HibernatePersistenceProvider] instead.

那么，问题是我的配置错误(我可以避免吗？)，还是 Hibernate 实现中的问题？

已更新

这是我使用的代码:

import net.roseindia.model.Product;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;

public class AppTest {

private static final String PERSISTENCE_UNIT_NAME = "unit1";
private static EntityManagerFactory factory;

public class AppTest {

    private static final String PERSISTENCE_UNIT_NAME = "unit1";
    private static EntityManagerFactory factory;

    public static void main(String[] args) {
        factory = Persistence.createEntityManagerFactory(PERSISTENCE_UNIT_NAME);
        EntityManager em = factory.createEntityManager();

        em.getTransaction().begin();

        Product product = new Product();
        product.setProductName("JPA 2.1 Book");
        product.setProductDescription("This is the latest book on JPA 2.1");
        product.setStockQty(100.00);
        product.setPrice(95.99);
        em.persist(product);
        em.getTransaction().commit();
        em.close();
        factory.close();

    }
}

Answer 1

对于遇到这个问题的 Spring 人员，这是正在发生的事情:即使 Spring 人员解决了类 HibernateJpaVendorAdapter 的问题，您实际上需要告诉您的 JPA EntityManagerFactory 以使用这个类。我已经使用以下配置删除了警告(注意我已经为 jpaVendorAdapter 指定了一个 bean):

<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean">
    <property name="persistenceUnitName" value="goal-control-unit" />
    <property name="jpaDialect">
        <bean class="cl.antica.goalcontrol.util.ExtendedHibernateJPADialect" />
    </property>
    <property name="jpaVendorAdapter">
        <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"/>
    </property> 
</bean>

我已经调试了您的代码，似乎已弃用的类是由 Persistence 类自动加载的。这是 createEntityManagerFactory 的实际代码，当您通过仅传递持久性单元名称调用它时调用它:

public static EntityManagerFactory createEntityManagerFactory(String persistenceUnitName, Map properties) {
    EntityManagerFactory emf = null;
    List<PersistenceProvider> providers = getProviders();
    for ( PersistenceProvider provider : providers ) {
        emf = provider.createEntityManagerFactory( persistenceUnitName, properties );
        if ( emf != null ) {
            break;
        }
    }
    if ( emf == null ) {
        throw new PersistenceException( "No Persistence provider for EntityManager named " + persistenceUnitName );
    }
    return emf;
}

默认情况下，getProviders() 方法包括 org.hibernate.ejb.HibernatePersistence 作为第一个可能的提供者(我猜是作为后备解决方案)。我会做的是这样的:

import java.util.List;
import java.util.Map;

import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import javax.persistence.PersistenceException;
import javax.persistence.spi.PersistenceProvider;
import javax.persistence.spi.PersistenceProviderResolverHolder;

import org.hibernate.ejb.HibernatePersistence;

@SuppressWarnings({"deprecation", "rawtypes"})
public class CustomPersistence extends Persistence {

    public static EntityManagerFactory createEntityManagerFactory(String persistenceUnitName) {
        return CustomPersistence.createEntityManagerFactory(persistenceUnitName, null);
    }

    public static EntityManagerFactory createEntityManagerFactory(String persistenceUnitName, Map properties) {
        EntityManagerFactory emf = null;
        List<PersistenceProvider> providers = getProviders();
        PersistenceProvider defaultProvider = null;
        for (PersistenceProvider provider : providers) {
            if (provider instanceof HibernatePersistence) {
                defaultProvider = provider;
                continue;
            }
            emf = provider.createEntityManagerFactory(persistenceUnitName, properties);
            if (emf != null) {
                break;
            }
        }
        if (emf == null && defaultProvider != null)
            emf = defaultProvider.createEntityManagerFactory( persistenceUnitName, properties );
        if ( emf == null ) {
            throw new PersistenceException( "No Persistence provider for EntityManager named " + persistenceUnitName );
        }
        return emf;
    }

    protected static List<PersistenceProvider> getProviders() {
        return PersistenceProviderResolverHolder
                .getPersistenceProviderResolver()
                .getPersistenceProviders();
    }

}

我已经测试了该代码，它似乎足以解决问题。在您的代码中，您只需用此 CustomPersistence 替换 Persistence 类。我希望这会有所帮助。