Hibernate4 获取SessionFactory

import org.hibernate.HibernateException;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;

public class Test {

    private static Configuration configuration = null;
    private static SessionFactory sessionFactory = null;
    private static ServiceRegistry serviceRegistry = null;
    public static void main(String[] args) {
        try {
            configuration = new Configuration().configure();
            serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();
            sessionFactory = configuration.buildSessionFactory(serviceRegistry);
        } catch (HibernateException e) {
            e.printStackTrace();
        }
    }

}