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程序运行结果与视频不一致，采用getCurrentSession（）获得的connection为何不一致

使用GetCurrentSession()，打印出来的connection对象的hashcode是不同的，这是为什么

幕粉guosha

2016-11-23

源自：Hibernate初探之单表映射 2-6

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3 回答

zqdip
2017-09-22

@Test
	public void testSaveStudentWithGetCurrentSession(){
		Configuration config = new Configuration().configure();
		ServiceRegistry serviceRegistry = new ServiceRegistryBuilder().applySettings(config.getProperties()).buildServiceRegistry();
		SessionFactory sessionFactory = config.buildSessionFactory(serviceRegistry);
		
		Session session1 = sessionFactory.getCurrentSession();
		
		Transaction t = session1.beginTransaction();
		
		Student s = new Student(1,"张三","男",new Date(),"北京");
		session1.doWork(new Work(){
			@Override
			public void execute(Connection conn) throws SQLException {
				System.out.println("connection hasCode:"+conn.hashCode());
			}
		});
		
		session1.save(s);
		t.commit();
		
		
		Session session2 = sessionFactory.getCurrentSession();
		t = session2.beginTransaction();
		s = new Student(2,"李四","男",new Date(),"上海");
		session2.doWork(new Work(){
			@Override
			public void execute(Connection conn) throws SQLException {
				System.out.println("connection hasCode:"+conn.hashCode());
			}
		});
		
		session2.save(s);
		t.commit();
		
	}

配置文件

<hibernate-configuration>
    <session-factory>
    	<property name="connection.username">root</property>
    	<property name="connection.password">12721931</property>
    	<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
    	<property name="connection.url">jdbc:mysql:///hibernate?useUnicode=true&amp;characterEncoding=UTF-8</property>
    	<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
   
   
   		<property name="show_sql">true</property>
   		<property name="format_sql">true</property>
   		<property name="hibernate.default_schema">hibernate</property>
   		<property name="hbm2ddl.auto">create</property>
   		<property name="hibernate.current_session_context_class">thread</property>
   
   		<mapping resource="Student.hbm.xml"/>
    </session-factory>
</hibernate-configuration>

运行结果

connection hasCode:737077247
Hibernate: 
    insert 
    into
        hibernate.STUDENT
        (NAME, GENDER, BIRTHDAY, ADDRESS, SID) 
    values
        (?, ?, ?, ?, ?)
connection hasCode:335359181
Hibernate: 
    insert 
    into
        hibernate.STUDENT
        (NAME, GENDER, BIRTHDAY, ADDRESS, SID) 
    values
        (?, ?, ?, ?, ?)