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！





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