JPA 2.1 / Hibernate 4.3弃用警告

Question

我正在使用JPA 2.1示例应用程序并执行Hibernate 4.3.x。

<?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我有以下依赖。

<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），但启动时会收到以下警告消息。

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，这是我的错误配置问题（我可以避免它吗？），或者它是Hibernate实现中的问题？

已更新

以下是我使用的代码：

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

对于有这个问题的Spring人来说，这就是正在发生的事情：即使Spring的人解决了类 HibernateJpaVendorAdapter 的问题，你实际上需要告诉你的 JPA EntityManagerFactory < / strong>使用此课程。我已使用以下配置删除了警告（请注意我已为 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>

我已调试了您的代码，似乎已弃用的类由持久性类自动加载。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;
}

getProviders（）方法默认包含 org.hibernate.ejb.HibernatePersistence 作为第一个可能的提供程序（我猜测为后备解决方案）。我会做的是这样的事情：

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，您只需要通过此 CustomPersistence 替换持久性类。我希望这会有所帮助。

Answer 2

这个问题似乎是作为hibernate中的一个错误提交的，并且已针对5.0.0.Beta1修复，请参阅https://hibernate.atlassian.net/browse/HHH-9141

至少我遇到了同样的问题，并且将依赖项更改为此版本会使我的警告消失：

<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-entitymanager</artifactId>
    <version>5.0.0.Beta1</version>
</dependency>

Answer 3

通过遵循弃用警告中的建议，我发现可以通过相对整齐的Spring bean创建Entity Manager Factory来解决这个问题。

从这里开始：

WARN: HHH015016: Encountered a deprecated javax.persistence.spi.PersistenceProvider [org.hibernate.ejb.HibernatePersistence]; use [org.hibernate.jpa.HibernatePersistenceProvider] instead.

我们可以看到从HibernatePersistenceProvider javadocs获取与javax.persistence.EntityManagerFactory兼容的类的路径。首先，您需要一个HibernatePersistenceProvider实例，然后调用createEntityManagerFactory方法。这是Spring Bean连线，它避免了弃用警告：

<bean id="persistenceProvider" class="org.hibernate.jpa.HibernatePersistenceProvider">
</bean>
<bean id="emf" factory-bean="persistenceProvider" factory-method="createEntityManagerFactory">
   <constructor-arg value="testpersistence"/>
   <constructor-arg><map/></constructor-arg>
</bean>

有Stackoverflow thread here显示maven依赖项。