hibernate工作机制
1、讀取并解析配置文件首先項目里邊需要配置hibernate,配置文件名為hibernate.cfg.xml,(還有另一種配置方式,hibernate.properties,但是這樣的方式沒有xml配置文件那樣清晰,不經常使用,hibernate xml配置文件詳見:http://blog.csdn.net/xzh121121/article/details/79279254)2、讀取并解析映射信息,創建SessionFactory解析hibernate配置文件之后,開始創建sessionFactory.session工廠創建好之后,就可以創建session了3、打開Sesssion打開的session就可以進操作了,開啟事務,4、創建事務 Transation事務通過session創建之后,就可以對數據進行操作了5、持久化操作持久化操作,數據庫數據存在這樣幾種狀態,(瞬態,游離態,持久態,三種狀態請詳見:http://blog.csdn.net/xzh121121/article/details/79279399)6、提交事務把數據持久化之后就可以做事務提交了,這樣數據庫的數據才算是做了修改,但是這里的事務提交就需要謹慎控制,以防出現數據臟讀或幻讀的情況,數據庫事務詳見:http://blog.csdn.net/xzh121121/article/details/792795607、關閉Session提交了事務之后,我們就可以把session關閉了,session關閉需要注意這樣幾個地方:http://blog.csdn.net/xzh121121/article/details/792798118、關閉SesstionFactory在做完數據的修改的最后需要將session關閉,而后還要關閉sessionfactory,
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