package qq.dao.hibernate;import org.hibernate.HibernateException;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.cfg.Configuration;public class HibernateUtil {	private static SessionFactory sf;	static{		try {			sf=new Configuration().configure().buildSessionFactory();		} catch (HibernateException e) {			e.printStackTrace();		}	}		public static Session getSession(){		if(sf!=null){			return sf.openSession();		}else{			return null;		}	}}