hibernate原理
1.Configuration config=new Configuration().config();//读取并解析hibernate.cfg.xml
2.<mapping resource="xxxMapping.xml"/>//hibernate.cfg.xml读取并解析映射信息
3.SessionFactory sessionFactory=config.buildSessionFactory();//创建会话工厂
4.Session session=sessionFactory.openSession();//打开session
5.Transaction transaction=session.beginTransaction();//创建并开启transaction
6.persistent operation//操作数据库
7.transaction.commit();//提交事务
8.session.close();//关闭会话