在Hibernate中使用现有的JDBC连接对象

Question

我试图让Hibernate使用我从Tomcat连接池获取或通过DriverManager.getConnection(...)创建的现有连接对象连接到我的MariaDB数据库。两种方法都起作用，我收到一个Connection对象，可以同时执行读取和写入操作。现在，我想将这些对象提供给Hibernate。我已选择这样做：

public class SessionFactoryService implements ISessionFactoryService {

private SessionFactory sessionFactory = null;

private final Connection connection;

@Inject
public SessionFactoryService(Connection connection){

    this.connection = connection;
}

public Session getSession(){

    SessionFactory sessionFactory = new Configuration().configure().buildSessionFactory();

    SessionBuilder sb = sessionFactory.withOptions();

    return sb.connection(connection).openSession();
}}

[当我调用getSession()时，我得到一个有效的会话对象，可以在Hibernate中对其执行选择语句。但是，当我尝试调用session.persist(someobj)时，出现以下异常：

Exception in thread "main" java.lang.UnsupportedOperationException: The application must supply JDBC connections

我已经搜索了几个小时内遇到相同问题但没有成功的人，非常感谢您的帮助！

EDIT1：

我的休眠配置看起来像这样：

<?xml version = "1.0" encoding = "utf-8"?>
<!DOCTYPE hibernate-configuration SYSTEM
    "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>

    <property name = "hibernate.dialect">
        org.hibernate.dialect.MySQLDialect
    </property>

    <mapping class="com.xxx.yyy.Object"></mapping>

</session-factory>
</hibernate-configuration>

由于连接对象已在外部设置，因此我仅在hibernate.cfg.xml中设置方言。

完整的堆栈跟踪看起来像这样：

Exception in thread "main" java.lang.UnsupportedOperationException: The application must supply JDBC connections
at org.hibernate.engine.jdbc.connections.internal.UserSuppliedConnectionProviderImpl.getConnection(UserSuppliedConnectionProviderImpl.java:44)
at org.hibernate.internal.NonContextualJdbcConnectionAccess.obtainConnection(NonContextualJdbcConnectionAccess.java:35)
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcIsolationDelegate.delegateWork(JdbcIsolationDelegate.java:48)
at org.hibernate.id.enhanced.TableStructure$1.getNextValue(TableStructure.java:125)
at org.hibernate.id.enhanced.NoopOptimizer.generate(NoopOptimizer.java:40)
at org.hibernate.id.enhanced.SequenceStyleGenerator.generate(SequenceStyleGenerator.java:452)
at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:105)
at org.hibernate.event.internal.DefaultPersistEventListener.entityIsTransient(DefaultPersistEventListener.java:189)
at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:132)
at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:58)
at org.hibernate.internal.SessionImpl.firePersist(SessionImpl.java:782)
at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:767)
at com.xxx.yyy.ServiceA.create(ServiceA.java:75)
at com.xxx.yyy.App.main(App.java:60)

Answer 1

return sb.openStatelessSession(connection);

或

 sessionFactory.withOptions().connection(Connection conn);
 return sb.openSession();