_学习笔记

<br />Hibernate中的对象有三种状态： 瞬时状态(Transient)，持久状态(Persistent)，<br />1． 脱管状态(Detached)<br /><br />1． １．瞬时状态(Transient)<br />由new命令开辟内存空间的Java对象，也就是平时所熟悉的普通Java对象。<br />如：Student stu = new Student();<br /> <br />瞬时对象特点：<br />(1)不和Session实例关联<br />(2)在数据库中没有和瞬时对

/** * Return the persistent instance of the given entity class with the given identifier, * assuming that the instance exists. This method might return a proxied instance that * is initia

配置1：  java ：      SCompany c =  (SCompany) s.get(SCompany.class, new Long("22"));    s.delete(c);    s.beginTransaction().commit();  结果1： 2011-06-20 12:25:14,562 [or