Question

您好我正在使用Hibernate和HSQL实现一个简单的应用程序。然而Hibernate表现得很奇怪！我想在两个值之间查询一些实体，但是只返回一个实体而不是整个列表。

这是我的方法。

 @Override
    public List<ClientConnectionEntity> getConnectionBetween(long start, long end) {
        Session session = sessionFactory.openSession();
        Query query = session.createQuery("FROM com.cayetano.persistense.entities.ClientConnectionEntity c" +
                " WHERE c.connectionTime between :start and :end ")
                .setParameter("start", start)
                .setParameter("end", end);
        List<ClientConnectionEntity> list = query.list();
        session.close();
        return list;
    } 




@Override
    public void saveConnection(ClientConnectionEntity entity) {


        Session session = sessionFactory.openSession();


        Transaction transaction = session.beginTransaction();


        session.persist(entity);


        transaction.commit();

        session.close();
    }



@Test
    public void returnsClientConnectionsBetweenTwoDates() {

        ClientConnectionEntity entity1 = new ClientConnectionEntity();
        entity1.setConnectionTime(1l);
        entity1.setClientBrowser("1");

        ClientConnectionEntity entity2 = new ClientConnectionEntity();
        entity1.setConnectionTime(2l);
        entity1.setClientBrowser("2");

        ClientConnectionEntity entity3 = new ClientConnectionEntity();
        entity1.setConnectionTime(2l);
        entity1.setClientBrowser("2");


        ClientConnectionEntity entity4 = new ClientConnectionEntity();
        entity1.setConnectionTime(4l);
        entity1.setClientBrowser("4");


        repository.saveConnection(entity1);
        repository.saveConnection(entity2);
        repository.saveConnection(entity3);
        repository.saveConnection(entity4);

        assertThat(repository.getConnections().size(),is(4)); // this one is Ok 

        List<ClientConnectionEntity> expected =  repository.getConnectionBetween(2l, 4l);

        assertThat(expected.size(), is(2));

    }

并且测试失败......

java.lang.AssertionError: 
Expected: is <2>
     but: was <1>
    at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:20)
    at org.junit.Assert.assertThat(Assert.java:865)
    at org.junit.Assert.assertThat(Assert.java:832)

Answer 1

    ClientConnectionEntity entity1 = new ClientConnectionEntity();
    entity1.setConnectionTime(1l);
    entity1.setClientBrowser("1");

    ClientConnectionEntity entity2 = new ClientConnectionEntity();
    entity1.setConnectionTime(2l);
    entity1.setClientBrowser("2");

    ClientConnectionEntity entity3 = new ClientConnectionEntity();
    entity1.setConnectionTime(2l);
    entity1.setClientBrowser("2");


    ClientConnectionEntity entity4 = new ClientConnectionEntity();
    entity1.setConnectionTime(4l);
    entity1.setClientBrowser("4");

您进行了复制/粘贴，忘记更改变量名称

无法在hibernate中实现一个between语句

1 个答案: