hibernate之如何获得session对象

一 如何获得session对象

1、openSession

2、getCurrentSession

 

 

二 用openSession获得session对象

1、代码

import org.hibernate.Session;

import org.hibernate.SessionFactory;

import org.hibernate.cfg.Configuration;

import org.hibernate.service.ServiceRegistry;

import org.hibernate.service.ServiceRegistryBuilder;

import org.junit.Test;

 

public class SessionTest {

        @Test

        public void testOpenSession(){

            // 创建配置对象  

            Configuration config = new Configuration().configure();

            // 创建服务注册对象

            ServiceRegistry serviceRegistery = new ServiceRegistryBuilder().applySettings(config.getProperties()).buildServiceRegistry();

            // 创建会话工厂对象

            SessionFactory sessionFactory = config.buildSessionFactory(serviceRegistery);

            // 创建会话对象

            Session session = sessionFactory.openSession();

            if(session!=null){

                System.out.println("session创建成功！");

            }

            else{

                System.out.println("session创建失败！");

            }               

        }

}

2、运行结果

session创建成功！

 

三 用getCurrentSession获得session对象

1、代码

<property name="hibernate.current_session_context_class">thread</property>

 

import org.hibernate.Session;

import org.hibernate.SessionFactory;

import org.hibernate.cfg.Configuration;

import org.hibernate.service.ServiceRegistry;

import org.hibernate.service.ServiceRegistryBuilder;

import org.junit.Test;

 

public class SessionTest {        

        @Test

        public void testGetCurrentSession(){

            // 创建配置对象  

            Configuration config = new Configuration().configure();

            // 创建服务注册对象

            ServiceRegistry serviceRegistery = new ServiceRegistryBuilder().applySettings(config.getProperties()).buildServiceRegistry();

            // 创建会话工厂对象

            SessionFactory sessionFactory = config.buildSessionFactory(serviceRegistery);

            // 创建会话对象

            Session session = sessionFactory.getCurrentSession();

            if(session!=null){

                System.out.println("getCurrentSession创建成功！");

            }

            else{

                System.out.println("getCurrentSession创建失败！");

            }

        }

}

2、运行结果

getCurrentSession创建成功！