Java 休眠加载同一行

我有一张桌子

canvastowidgets
{
    idCanvas int PK
    idWidgets int PK
    version varchar
    sequence int
    position int
    inPanelOrNot int
}

和映射xml，如下所示

<hibernate-mapping>
    <class name="com.config.canvas.CanvasHasWidget" table="canvastowidgets">
        <id name="canvasId" type="int">
            <column name="idCanvas" />
            <generator class="assigned" />
        </id>
        <property name="widgetId" type="int">
            <column name="idWidgets" />
        </property>
        <property name="sequence" type="int">
            <column name="sequence" />
        </property>
        <property name="position" type="int">
            <column name="position" />
        </property>
        <property name="inPanel" type="boolean">
            <column name="inPanelOrNot" />
        </property>
    </class>
</hibernate-mapping>

Query query = session.createQuery("from CanvasHasWidget where idCanvas = :id");
        query.setParameter("id",canvas.getCanvasId());
        return query.list();

疑问是

select canvashasw0_.idCanvas as idCanvas1_2_, canvashasw0_.idWidgets as idWidget2_2_, canvashasw0_.sequence as sequence3_2_, canvashasw0_.position as position4_2_, canvashasw0_.inPanelOrNot as inPanelO5_2_ from canvastowidgets canvashasw0_ where idCanvas=?

07:38:16822 TRACE BasicBinder:81-将参数[1]绑定为[INTEGER]-[1]
07:38:16829 TRACE BasicExtractor:78-提取的值（[idCanvas1_2\]：[INTEGER]）-[1] 07:38:16835 TRACE BasicExtractor:78-提取的值（[idCanvas1_2_]：[INTEGER]）-[1] 07:38:16840 TRACE BasicExtractor:78-提取值（[idCanvas1_2_]：[INTEGER]）-[1]

---

列表返回3行，表中有3行。但是返回的所有3行都是相同的。

问题是您的表有一个复合主键，如下所示：

idCanvas int PK
idWidgets int PK

但您只映射了其中一个。更改映射并将

id

部分替换为

<composite-id>
    <key-property name="idCanvas"/>
    <key-property name="idWidgets"/>
</composite-id>

直接在数据库中运行查询时会发生什么？选择canvashasw0_u0.idCanvas作为idCanvas1_2_0，canvashasw0.idWidgets作为idWidget2_0，canvashasw0.sequence作为sequence3_2_0，canvashasw0_0.position作为position4_2_0，canvashasw0_0.inPanelOrNot作为canvastowidgets CanvasW0的inPanelO5_2_0，其中IDCanvasCanvasWu0=？表的PK是一个对偶（IDCanvasCanvas，idWidgets），而您只映射了其中一个。这就是导致问题的原因。@Javakid它返回3个不同的行，而不是same@Ean你能分享hbm文件片段吗？我想这可以解决你的问题，但不确定，因为我记不清了