Hibernate初始化环境的基本封装

public class HibernateUtils {
	
	private static SessionFactory sf;
	
	static{
		sf = new Configuration().configure().buildSessionFactory();
	}
	
	public static SessionFactory getSessionFactory(){
		return sf;
	}
	
	public static Session getSession(){
		return sf.openSession();
	}
	
	public static void closeSession(Session session){
		session.close();
	}
	
	public static void closeResource(Session session){
		session.close();
		sf.close();
	}
}