hibernate课程 初探一对多映射2-3 创建hibernateUtil工具类

本节主要内容：创建hibernateUtil工具类：demo

demo:

HibernateUtil.java

package hibernate_001;

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

public class HibernateUtil {  private static SessionFactory sessionFactory;  private static Session session;    static{   //1  新建配置对象   Configuration config = new Configuration().configure();   //2  新建服务注册对象   ServiceRegistry service = new ServiceRegistryBuilder().applySettings(config.getProperties()).buildServiceRegistry();   //3  新建会话工厂   sessionFactory = config.buildSessionFactory(service);  }    //获取会话工厂  public static SessionFactory getSessionFactory(){   return sessionFactory;     }

//获取会话  public static Session getSession() {   session = sessionFactory.openSession();   return session;  }    //关闭会话  public static void closeSession(Session session){   if(session!=null){    session.close();   }  }

}