import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;
 
 
// 
 
private static SessionFactory sessionFactory;
private static ServiceRegistry serviceRegistry;
 
Session session = null;
 
try 
  {
  try
    {
    Configuration cfg = new Configuration().addResource(
    "configuracion_file.hbm.xml").configure();
 
    serviceRegistry = new ServiceRegistryBuilder().applySettings(
        cfg.getProperties()).buildServiceRegistry();
    sessionFactory = cfg.buildSessionFactory(serviceRegistry);
    }
  catch (Throwable ex)
    {
    System.err.println("Failed to create sessionFactory object."+ ex);
       throw new ExceptionInInitializerError(ex);
    }
  session = sessionFactory.openSession();
 
  Transaction tx = session.beginTransaction();
 
  //
 
  session.save(xxx);
  tx.commit();
  } catch (Exception e) {
    System.out.println(e.getMessage());
  } finally {
    session.close();
  }