Java 休眠选择并插入奇怪行为

我正在开发一个Spring+Hibernate应用程序，一切都很好。做一个方法我发现了一个奇怪的行为，我真的无法解释，所以我会告诉你我得到了什么，也许我们会找到一个解决办法

此方法检索解析网页的足球运动员列表，我尝试查找数据库中是否已有同名球员；如果我已经有了它，我会设置一些参数并更新该对象。如果我没有这个名字的球员，我想插入它。我显然不能使用

saveOrUpdate

方法，因为我解析的对象没有id，因为我没有从数据库中检索它们

这是生成错误的代码段（它位于服务层，然后声明为

事务性

）：

结果很奇怪：列表的第一个对象毫无问题地通过了方法

getCalciatoreByNome

；由于数据库中没有实例，因此流将转到insert。

的第一轮
结束后，这是控制台：

Hibernate: 
    select
        this_.kid as kid1_0_3_,
        this_.attivo as attivo2_0_3_,
        this_.dataDiNascita as dataDiNa3_0_3_,
        this_.nome as nome4_0_3_,
        this_.ruolo as ruolo5_0_3_,
        this_.squadraCorrente_kid as squadraC9_0_3_,
        this_.squadraReale as squadraR6_0_3_,
        this_.urlFigurina as urlFigur7_0_3_,
        this_.version as version8_0_3_,
        squadrafan2_.kid as kid1_7_0_,
        squadrafan2_.attiva as attiva2_7_0_,
        squadrafan2_.nome as nome3_7_0_,
        squadrafan2_.utenteAssociato_kid as utenteAs5_7_0_,
        squadrafan2_.version as version4_7_0_,
        utente3_.kid as kid1_10_1_,
        utente3_.attivo as attivo2_10_1_,
        utente3_.hashPwd as hashPwd3_10_1_,
        utente3_.ruolo_kid as ruolo_ki6_10_1_,
        utente3_.username as username4_10_1_,
        utente3_.version as version5_10_1_,
        ruolo4_.kid as kid1_5_2_,
        ruolo4_.nome as nome2_5_2_,
        ruolo4_.version as version3_5_2_ 
    from
        Calciatore this_ 
    left outer join
        SquadraFantacalcio squadrafan2_ 
            on this_.squadraCorrente_kid=squadrafan2_.kid 
    left outer join
        Utente utente3_ 
            on squadrafan2_.utenteAssociato_kid=utente3_.kid 
    left outer join
        Ruolo ruolo4_ 
            on utente3_.ruolo_kid=ruolo4_.kid 
    where
        this_.nome=?
Hibernate: 
    call next value for SEQ_CALCIATORE

正如您所看到的，没有引发异常，但行为已经被破坏，因为没有真正执行插入！日志的最后一行仅显示序列生成器

在
for
循环的第二轮
中，当流接近
getCalciatoreByNome
方法时，这是控制台日志：

Hibernate: 
    insert 
    into
        Calciatore
        (attivo, dataDiNascita, nome, ruolo, squadraCorrente_kid, squadraReale, urlFigurina, version, kid) 
    values
        (?, ?, ?, ?, ?, ?, ?, ?, ?)
24/06/2015 09:03:27 - INFO  - (AbstractBatchImpl.java:208) - HHH000010: On release of batch it still contained JDBC statements
24/06/2015 09:03:27 - WARN  - (SqlExceptionHelper.java:144) - SQL Error: -5563, SQLState: 42563
24/06/2015 09:03:27 - ERROR - (SqlExceptionHelper.java:146) - incompatible data type in operation
24/06/2015 09:03:39 - DEBUG - (AbstractPlatformTransactionManager.java:847) - Initiating transaction rollback

哇，真奇怪。当我第二次尝试执行select方法时，Hibernate尝试使
insert
生成我在任何地方都找不到的错误，然后开始回滚\异常生成

我试着尽可能多地调试，但我不能真正理解发生了什么，因为当我以独立方式执行这些操作时，一切似乎都正常

有什么建议吗？
使用时，当前挂起的更改将在以下情况下刷新：


事务提交
执行查询

当您发出
insert
命令时，Hibernate只在操作队列中添加一个
EntityInsertAction
，但它不会

您看到在第二个迭代周期执行insert的原因是select查询触发刷新。
在实体类中kid是否可以
null
？kid是由序列生成的，因此当我进行插入时，如果kid为null，则没有问题。我现在附上关于这个问题的钙化实体类。所以是的！请将SEQ_CALCIATORE的
Hibernate:call next值从Select Log右侧移动到Insert-Log。如果发布实体，请也发布表的DDL。我猜是属性的类型与数据库中字段或序列的类型不匹配。这就是hibernate的工作方式。执行选择操作时，所有挂起的更改都会刷新到数据库中，以便当前事务可以看到它们。因此，在执行下一次选择之前，将执行挂起的插入/更新。选择序列是因为保存（或持久化）需要知道要插入的对象的id，以便在需要时插入。
public Boolean insert(T obj) throws DataAccessException {
        getSession().save(obj);
        return true;
    }

Hibernate: 
    select
        this_.kid as kid1_0_3_,
        this_.attivo as attivo2_0_3_,
        this_.dataDiNascita as dataDiNa3_0_3_,
        this_.nome as nome4_0_3_,
        this_.ruolo as ruolo5_0_3_,
        this_.squadraCorrente_kid as squadraC9_0_3_,
        this_.squadraReale as squadraR6_0_3_,
        this_.urlFigurina as urlFigur7_0_3_,
        this_.version as version8_0_3_,
        squadrafan2_.kid as kid1_7_0_,
        squadrafan2_.attiva as attiva2_7_0_,
        squadrafan2_.nome as nome3_7_0_,
        squadrafan2_.utenteAssociato_kid as utenteAs5_7_0_,
        squadrafan2_.version as version4_7_0_,
        utente3_.kid as kid1_10_1_,
        utente3_.attivo as attivo2_10_1_,
        utente3_.hashPwd as hashPwd3_10_1_,
        utente3_.ruolo_kid as ruolo_ki6_10_1_,
        utente3_.username as username4_10_1_,
        utente3_.version as version5_10_1_,
        ruolo4_.kid as kid1_5_2_,
        ruolo4_.nome as nome2_5_2_,
        ruolo4_.version as version3_5_2_ 
    from
        Calciatore this_ 
    left outer join
        SquadraFantacalcio squadrafan2_ 
            on this_.squadraCorrente_kid=squadrafan2_.kid 
    left outer join
        Utente utente3_ 
            on squadrafan2_.utenteAssociato_kid=utente3_.kid 
    left outer join
        Ruolo ruolo4_ 
            on utente3_.ruolo_kid=ruolo4_.kid 
    where
        this_.nome=?
Hibernate: 
    call next value for SEQ_CALCIATORE

Hibernate: 
    insert 
    into
        Calciatore
        (attivo, dataDiNascita, nome, ruolo, squadraCorrente_kid, squadraReale, urlFigurina, version, kid) 
    values
        (?, ?, ?, ?, ?, ?, ?, ?, ?)
24/06/2015 09:03:27 - INFO  - (AbstractBatchImpl.java:208) - HHH000010: On release of batch it still contained JDBC statements
24/06/2015 09:03:27 - WARN  - (SqlExceptionHelper.java:144) - SQL Error: -5563, SQLState: 42563
24/06/2015 09:03:27 - ERROR - (SqlExceptionHelper.java:146) - incompatible data type in operation
24/06/2015 09:03:39 - DEBUG - (AbstractPlatformTransactionManager.java:847) - Initiating transaction rollback