package?dao;

import?org.hibernate.Session;
import?org.hibernate.SessionFactory;
import?org.hibernate.cfg.Configuration;

public?class?HibernateUtil?{
	//?初始化一個ThreadLocal對象
	private?static?final?ThreadLocal?sessionTL?=?new?ThreadLocal（）;?
	private?static?Configuration?configuration;
	private?final?static?SessionFactory?sessionFactory;
	static?{
		try?{
			configuration?=?new?Configuration（）.configure（）;
			sessionFactory?=?configuration.buildSessionFactory（）;
		}?catch?（Throwable?ex）?{
			throw?new?ExceptionInInitializerError（ex）;
		}
	}
	public?static?Session?currentSession（）?{
		//sessionTL的get（）方法根據當前線程返回其對應的線程內部變量，
		//也就是我們需要的Session，多線程情況下共享數據庫連接是不安全的。
		//ThreadLocal保證了每個線程都有自己的Session。
		Session?session?=?（Session）?sessionTL.get（）;?
		//?如果session為null，則打開一個新的session
		if?（session?==?null）?{?
			//創建一個數據庫連接對象session。
			session?=?sessionFactory.openSession（）;?
			//?保存該數據庫連接session到ThreadLocal中。
			sessionTL.set（session）;?
		}
		//如果當前線程已經訪問過數據庫了，
		//則從sessionTL中get（）就可以獲取該線程上次獲取過的數據庫連接對象。
		return?session;?
	}
	/**
	?*?關閉Session
	?*/
	public?static?void?closeSession（）{
		Session?session?=?（Session）?sessionTL.get（）;?
		sessionTL.set（null）;
		session.close（）;
	}

}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2015-12-11?23:22??house2\
?????文件????????2017??2015-12-11?23:13??house2\.classpath
?????目錄???????????0??2015-12-02?20:53??house2\.myeclipse\
?????文件?????????296??2015-12-11?22:54??house2\.mymetadata
?????文件????????1749??2015-12-10?17:56??house2\.project
?????目錄???????????0??2015-12-11?23:22??house2\.settings\
?????文件?????????500??2015-12-02?20:53??house2\.settings\.jsdtscope
?????文件??????????99??2015-12-11?22:54??house2\.settings\com.genuitec.eclipse.j2eedt.core.xml
?????文件?????????364??2015-12-02?20:53??house2\.settings\org.eclipse.jdt.core.prefs
?????文件?????????461??2015-12-10?17:56??house2\.settings\org.eclipse.wst.common.component
?????文件?????????126??2015-12-11?22:54??house2\.settings\org.eclipse.wst.common.project.facet.core.xml
?????文件??????????49??2015-12-02?20:53??house2\.settings\org.eclipse.wst.jsdt.ui.superType.container
?????文件???????????6??2015-12-02?20:53??house2\.settings\org.eclipse.wst.jsdt.ui.superType.name
?????目錄???????????0??2015-12-11?23:22??house2\src\
?????目錄???????????0??2015-12-11?23:22??house2\src\dao\
?????文件????????1532??2015-12-02?23:17??house2\src\dao\HibernateUtil.java
?????文件?????????334??2015-12-11?23:07??house2\src\dao\IHouseDao.java
?????目錄???????????0??2015-12-11?23:22??house2\src\dao\Impl\
?????文件????????9856??2015-12-11?23:08??house2\src\dao\Impl\HouseDaoImpl.java
?????文件????????1144??2015-12-03?17:42??house2\src\dao\Impl\UsersDaoImpl.java
?????文件?????????227??2015-12-03?17:42??house2\src\dao\IUsersDao.java
?????目錄???????????0??2015-12-11?23:22??house2\src\entity\
?????文件?????????912??2015-12-02?23:14??house2\src\entity\District.hbm.xml
?????文件?????????693??2015-12-07?13:01??house2\src\entity\District.java
?????文件????????1790??2015-12-07?14:19??house2\src\entity\House.hbm.xml
?????文件????????2040??2015-12-07?14:24??house2\src\entity\House.java
?????文件????????1155??2015-12-04?09:58??house2\src\entity\HouseCondition.java
?????文件????????1000??2015-12-07?18:41??house2\src\entity\PageInfo.java
?????文件????????1103??2015-12-05?21:47??house2\src\entity\Street.hbm.xml
?????文件?????????896??2015-12-07?13:01??house2\src\entity\Street.java
?????文件?????????900??2015-12-02?23:15??house2\src\entity\Types.hbm.xml
............此處省略136個文件信息