getCurrentSession
从上下文找,有,用旧的,没有,建新的
事物提交自动close
opensession
每次都是新的,必须关闭
//Session session = sessionFactory.opensession();
Session session = sessionFactory.getCurrentSession();
session.beginTransaction();
session.save();
Session session2 = sessionFactory.getCurrentSession();
System.out.println(session==session2);//true
session.getTransaction.commit();
Session session3 = sessionFactory.getCurrentSession();
System.out.println(session==session3);//false