如何从Hibernate 4.3.4.Final中检索sessionFactory？

Question

以前我使用以下代码配置sessionFactory，但在将hibernate版本从4.2.1.Final升级到4.3.4.Final后，我无法使用以下代码检索sessionFactory，因为ServiceRegistryBuilder（）已被弃用。

我使用这个链接来创建它，但提供的函数没有返回任何东西，因此它遇到了预编译错误。

 private static SessionFactory configureSessionFactory() {
        try {
            Configuration configuration = new Configuration();
            configuration.configure();
            serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();
            sessionFactory = configuration.buildSessionFactory(serviceRegistry);
            return sessionFactory;
        } catch (HibernateException e) {
            System.out.append("** Exception in SessionFactory **");
            e.printStackTrace();
        }
        return sessionFactory;
    }

     static {
    try {
        sessionFactory = configureSessionFactory();
    } catch (Exception e) {
        System.err.println("%%%% Error Creating SessionFactory %%%%");
        e.printStackTrace();
    }
}

private HibernateUtil() {
}

public static SessionFactory getSessionFactory() {
    return sessionFactory;
}

public static Session getSession() throws HibernateException {
    Session session = threadLocal.get();

    if (session == null || !session.isOpen()) {
        if (sessionFactory == null) {
            rebuildSessionFactory();
        }
        session = (sessionFactory != null) ? sessionFactory.openSession() : null;
        threadLocal.set(session);
    }

    return session;
}

public static void rebuildSessionFactory() {
    try {
        sessionFactory = configureSessionFactory();
    } catch (Exception e) {
        System.err.println("%%%% Error Creating SessionFactory %%%%");
        e.printStackTrace();
    }
}

public static void closeSession() throws HibernateException {
    Session session = (Session) threadLocal.get();
    threadLocal.set(null);

    if (session != null) {
        if (session.isOpen()) {
            session.close();
        }
    }
}

Answer 1

是的，他们已经弃用了以前的ServiceRegistryBuilder（），下面是使用Hibernate 4.3.4的方法

public void testConnection() throws Exception {

            logger.info("Trying to Connect With a DataBase.");
            Configuration configuration = new Configuration();
            configuration.configure("Your.cfg.xml");
            ServiceRegistryBuilder serviceRegistryBuilder = new ServiceRegistryBuilder().applySettings(configuration
                            .getProperties());
            SessionFactory sessionFactory = configuration
                            .buildSessionFactory(serviceRegistryBuilder.buildServiceRegistry());
            Session session = sessionFactory.openSession();
            logger.info("Database connection created successfuly.");
    }

来源：在Hibernate 4中创建会话工厂

Answer 2

我测试了这个，它在Hibernate 4.3.6上运行

public class HUtil{   
  private static SessionFactory sessionFactory;
private static ServiceRegistry serviceRegistry;

public static SessionFactory createSessionFactory() {
  Configuration configuration = new Configuration();
  configuration.configure();
serviceRegistry = new StandardServiceRegistryBuilder().
 applySettings(configuration.getProperties()).build();
  sessionFactory = configuration.configure().      buildSessionFactory(serviceRegistry);
  return sessionFactory;
}

public static SessionFactory getSessionFactory() {
    return createSessionFactory();
}  }

Answer 3

在4.3中，您应该使用StandardServiceRegistryBuilder。

import org.hibernate.boot.registry.StandardServiceRegistryBuilder

Standard ServiceRegstryBuilder被添加为ServiceRegstryBuilder的新父级。其余代码应该是相同的。我发现这一点“清楚”记录的唯一地方是在ServiceRegstryBuilder的4.3 JavaDocs中。

我没有注意到的一件事是，他们更改了ServiceRegistryBuilder。buildServiceRegistry（）方法，只需将其转换为StandardServiceRegistryBuilder.build（）。因此，它将要求您更改建筑过程的这一部分：

new ServiceRegistryBuilder()
        .applySettings(configuration.getProperties())
        .buildServiceRegistry();

变成：

new StandardServiceRegistryBuilder()
        .applySettings(configuration.getProperties())
        .build();