SessionFactory

Código # 1
public class HibernateUtil {
	private static SessionFactory factory;
	
	static {
		Configuration configuration = new AnnotationConfiguration();
		configuration.configure();
		factory = configuration.buildSessionFactory();
	}
	public static Session getSession(){
		logger.info("Open new session");
		return factory.openSession();
	}
	

}

Código #2
public class HibernateUtil {
	private static final SessionFactory sessionFactory = buildSessionFactory();
	private static SessionFactory buildSessionFactory(){
		try{
			Configuration cfg = new Configuration();
			cfg.configure("hibernate.cfg.xml");
			return cfg.buildSessionFactory();
		}catch(Throwable e){
			System.out.println("A criação do objeto sesion falou Erro:" + e);
			throw new ExceptionInInitializerError(e);
		}
	}
	public static SessionFactory getSessionFactory(){
		return sessionFactory;
	}

}