离线查询对象 Criteria

离线查询对象的思想，简化代码，不至于每一种插叙都要建立不同的查询路径

离线查询代码

//Service/web层
DetachedCriteria dc  = DetachedCriteria.forClass(Customer.class);
dc.add(Restrictions.idEq(6l));//拼装条件(全部与普通Criteria一致)
        
//Dao层
Session session = HibernateUtils.openSession();
Transaction tx = session.beginTransaction();
//获得非离线Criteria
Criteria c = dc.getExecutableCriteria(session);
List list = c.list();