作业里buildsessionFactory以过时，请问大佬怎么改成hibernate4.2.3可以用的代码，下附原码。

package test;
import javax.security.auth.login.Configuration;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;
import com.bean.User;
@test
public class hbtest {
public void testAdd(){
org.hibernate.cfg.Configuration cfg = new org.hibernate.cfg.Configuration();
cfg.configure();
SessionFactory sessionFactory =cfg.buildSessionFactory();
Session session = SessionFactory.openSession();
Transaction tx =session.beginTransaction();
User user =new User();
user.setName("管理员");
user.setPassword("123456");
session.save(user);
tx.commit();
session.close();
sessionFactory.close();
}
}