HibernateSessionFactory类的主要方法

package com.app.www.hibernate;

import java.sql.SQLException;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

public class HibernateSessionFactory
{
    private static final ThreadLocal<Session> threadLocal = new ThreadLocal<Session>();
    private static Configuration configuration = new Configuration().configure();
    private static SessionFactory sessionFactory;

    /**
     * 私有化构造
     */
    private HibernateSessionFactory()
    {
    }

    /**
     * 创建SessionFactory
     */
    public static void rebulidSessionFactory()
    {
        sessionFactory = configuration.buildSessionFactory();
    }

    /**
     * 获取SessionFactory
     * @return SessionFactory
     */
    public static SessionFactory getSessionFactory()
    {
        if(sessionFactory == null)
        {
            rebulidSessionFactory();
        }
        return sessionFactory;
    }

    /**
     * 获取Session
     * @return Session
     */
    public static Session getCurrentSession()
    {
        Session session = threadLocal.get();
        try
        {
            if (session == null || !session.isOpen() || session.connection().isClosed())
            {
                if (sessionFactory == null)
                {
                    rebulidSessionFactory();
                }
                session = (sessionFactory == null) ? null : sessionFactory.getCurrentSession();
                threadLocal.set(session);
            }
        } catch (HibernateException e)
        {
            e.printStackTrace();
        } catch (SQLException e)
        {
            e.printStackTrace();
        }
        return session;
    }

    /**
     * 关闭Session
     */
    public static void closeCurrentSession()
    {
        Session session = threadLocal.get();
        threadLocal.set(null);

        if (session != null)
        {
            session.close();
        }
    }

    /**
     * 获取 Configuration
     * @return Configuration
     */
    public static Configuration getConfiguration()
    {
        return configuration;
    }
}