求解决 SessionFactory 为什么创建失败？

public class HibernateUtil {



	private static SessionFactory sessionFactory;

	private static  ThreadLocal<Session> threadLocal;



	static{

		

	   try {

		   //创建工厂

		   Configuration cfg = new Configuration().configure();

           ServiceRegistry serviceRegistry = new ServiceRegistryBuilder().applySettings(cfg.getProperties()).buildServiceRegistry();

           sessionFactory = cfg.buildSessionFactory(serviceRegistry);

           

	   } catch (HibernateException e) {

	     System.err.println(e.getMessage());

	   }

	   

	   threadLocal = new ThreadLocal<Session>();

	}



	private HibernateUtil(){

	  

	}



        // 获取Session

	public static Session getSession()throws HibernateException{

	   Session session = threadLocal.get();

	   if(session==null){



		   if(sessionFactory==null){

			   System.out.println("sessionFactory为空！！！");

		   }



	    // 问题出在这里，openSession的时候报空指针，所以我在上面判断sessionFactory，

        // 结果确实输出了 sessionFactory为空！！！ 求解决sessionFactory 为什么创建失败？



	    session = sessionFactory.openSession();

	    threadLocal.set(session);



	   }

	   return session;

	} 

        

        // 关闭Session

	public static void closeSession()throws HibernateException{

	   Session session = threadLocal.get();

	   if(session!=null){

	    session.close();

	   }

	   threadLocal.set(null);

	} 

	

}

public class Test {

	

	Session session;

	Transaction transaction;



	@org.junit.Test

	public void test(){

			News news = new News("今晚武汉有雨","本报讯：预计今晚武汉地区局部有中到大雨，请注意防范",new Date());

			System.out.println(news);

			session = HibernateUtil.getSession();

			transaction = session.beginTransaction();

			session.save(news);

			transaction.commit();

			HibernateUtil.closeSession();

	}

}