Hibernate集合的二级缓存

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 /**     *  把cid 为1L的对象提取出来，再把该班级所有的学生提取出来     * */    @Test    public void testGetClasses_Students(){        Configuration configuration=new Configuration();        configuration.configure();        SessionFactory sessionFactory=configuration.buildSessionFactory();        Session session=sessionFactory.openSession();        Transaction transaction=session.beginTransaction();        Classes classes=(Classes)session.get(Classes.class,1L);        Set<Student> students=classes.getStudents();        for (Student s:students             ) {            System.out.println(s);        }        //必须遍历集合不然无法加载到二级缓存中        System.out.println(sessionFactory.getStatistics().getEntityLoadCount());        System.out.println(sessionFactory.getStatistics().getCollectionLoadCount());        transaction.commit();        System.out.println(sessionFactory.getStatistics().getCollectionLoadCount());        session.close();    }

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