Hibernate 4中buildSessionFactory()过时

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import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.cfg.Configuration;import org.hibernate.service.ServiceRegistryBuilder;public class MySessionFactory{    private static Configuration cfg = new Configuration();    private static SessionFactory sf = null;    private static ThreadLocal<Session> threadlocal = new ThreadLocal<Session>();        static{        cfg.configure("hibernate.cfg.xml");        ServiceRegistryBuilder srb = new ServiceRegistryBuilder().applySettings(cfg.getProperties());        sf = cfg.buildSessionFactory(srb.buildServiceRegistry());    }        public static Session get_current_session()    {        Session session = (Session) threadlocal.get();        if(session==null || !session.isOpen())        {            session = sf.getCurrentSession();            threadlocal.set(session);        }                return session;    }        public static void close_session()    {        Session session = (Session) threadlocal.get();        if(session != null)            threadlocal.set(null);    }}

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