How to get the session object in hibernate

How to get the session object

1、openSession

2、getCurrentSession

 

 

Second, use openSession to obtain the session object

1. Code

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(){

            // create configuration object  

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

            // create service registration object

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

            // create session factory object

            SessionFactory sessionFactory = config.buildSessionFactory(serviceRegistery);

            // create session object

            Session session = sessionFactory.openSession();

            if(session!=null){

System.out                 .println ( "Session created successfully!" );

            }

            else{

                System.out.println ( " Session creation failed!" );

            }               

        }

}

2. Running results

session created successfully!

 

Three use getCurrentSession to get the session object

1. Code

<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！