The method buildSessionFactory() from the type Configuration is deprecated.SessionFactory的变化

　　

　　在创建Configuration对象之后：Configuration cfg = new Configuration().configure();
　　要通过Configuration创建SessionFactory对象：

　　1. SessionFactory sf = cfg.buildSessionFactory();  // 是Hibernate3.X时的写法

　　2. ServiceRegistry sr = new ServiceRegistryBuilder().applySettings(cfg.getProperties()).buildServiceRegistry();是Hibernate4.3 ~ Hibernate4.0时的

　　3. ServiceRegistry sr = new StandardServiceRegistryBuilder().applySettings(cfg.getProperties()).build();  

　　　SessionFactory sf = cfg.buildSessionFactory(sr);  // Hibernate4.3时的