public void testSaveStudentsWithOpenSession() {

/*Hibernate5.x版本的测试方式*/

//获得服务注册对象

// 使用 final修饰引用变量时，当该引用变量被初始化赋值后，就不能再指向其他对象，但是该对象的内容可以修改。

// TODO 或许正是在这里使用了final，使用openSession而没有手动关闭，多次之后而【不会】导致连接池溢出

final StandardServiceRegistry registry = new StandardServiceRegistryBuilder().configure().build();

try {

//获得sessionFactory对象

SessionFactory sessionFactory = new MetadataSources(registry).buildMetadata().buildSessionFactory();

    //获得session对象

Session session1 = sessionFactory.openSession();    //

//开启事务

Transaction transaction = session1.beginTransaction();

//生成一个学生对象

Students s = new Students(1,"张三丰","男",new Date(),"北京");

session1.doWork(new Work() {

@Override

public void execute(Connection connection) throws SQLException {

// TODO Auto-generated method stub

System.out.println("connection hashcode:" + connection.hashCode());

}

});

session1.save(s);

//session1.close()  //

transaction.commit();  //提交事务

//获取第二个session

Session session2 = sessionFactory.openSession();

Transaction transaction2 = session2.beginTransaction();

s = new Students(2,"sd丰","男",new Date(),"北京");

session2.doWork(new Work() {

@Override

public void execute(Connection connection) throws SQLException {

// TODO Auto-generated method stub

System.out.println("connection hashcode:" + connection.hashCode());

}

});

session2.save(s);

//session1.close()  //

transaction2.commit();  //提交事务

} catch (Exception e) {

e.printStackTrace();

StandardServiceRegistryBuilder.destroy( registry );

}

}

}