HibernateUtil + MySessionFactory

package com.yyy.util;

//import org.hibernate.Session;

import org.hibernate.Session;

import org.hibernate.SessionFactory;

import org.hibernate.cfg.Configuration;

final public class HibernateUtil {

private static SessionFactory sessionFactory = null;

private static ThreadLocal<Session> threadLocal = new ThreadLocal<Session>();

public HibernateUtil(){

}

static{

sessionFactory = new Configuration().configure().buildSessionFactory();

}

//获取全新的session

public static Session openSession(){

return sessionFactory.openSession();

}

//获取和线程关联的session

public static Session getCurrentSession(){

Session session = threadLocal.get();

//判断是否得到

if(session == null){

session = sessionFactory.openSession();

//session对象设置到threadLocal -- 相当于session和线程绑定

threadLocal.set(session);

}

return session;

}

}

MySessionFactory

package com.yyy.util;

import org.hibernate.SessionFactory;

import org.hibernate.cfg.Configuration;

//使用hibernate请保证只有一个SessionFactory（一个数据库）

final public class MySessionFactory {

private static SessionFactory sessionFactory = null;

//1创建configuration对象

// Configuration configuration = new Configuration().configure();

//2 //2.创建会话工厂、SessionFactory》》重量级对象。

// SessionFactory sessionFactory = configuration.buildSessionFactory();

public MySessionFactory(){

}

static {

sessionFactory = new Configuration().configure().buildSessionFactory();

}

public static SessionFactory getsessionFactory(){

return sessionFactory;

}

}