hibernateコアクラスとインタフェース--openSessionとgetCurrentSessionの思想

[size=medium]

final public class HibernateUtil { //SqlHelper 
	[size=large]private static SessionFactory sessionFactory=null;
	//        
	private static ThreadLocal<Session> threadLocal=new ThreadLocal<Session>();
	private HibernateUtil(){};
	static {
		sessionFactory=new Configuration().configure("com/hsp/config/hsp.cfg.xml").buildSessionFactory();
	}
	
	//        sesession
	public static Session openSession(){
		return sessionFactory.openSession();
	}
	//        session
	public static Session getCurrentSession(){
		
		Session session=threadLocal.get();
		//      
		if(session==null){
			session=sessionFactory.openSession();
			// session      threadLocal,    session       
			threadLocal.set(session);
		}
		return session;
		
		
	}[/size]
	

[/size]