Java 休眠错误：HH000091

我刚开始冬眠。我的目标是将查询结果获取到ArrayList，但我不断得到错误：hh000091:预期类型：int，实际值：org.hibernate.collection.internal.PersistentSet

我坚信问题出在我的地图上，任何帮助都将不胜感激

错误

错误：HH000123:类中存在IllegalArgumentException:com.mycompany.mavenproject1.Medicamento，属性的setter方法：labJoin 2017年4月7日上午10:23:10 org.hibernate.property.BasicPropertyAccessor$BasicSetter 错误：HH000091:预期类型：int，实际值：org.hibernate.collection.internal.PersistentSet

我的HQL查询：

from Medicamento as m left join from Laboratorio as l where l.codigoLab=m.codigoLab

映射XML:

<class name="com.mycompany.mavenproject1.Medicamento" table="MEDICAMENTO" schema="ADMINFARMACIA" optimistic-lock="version">
  <id name="codigoMed" type="long">
            <column name="CODIGO_MED" not-null="true"/>
            <generator class="assigned" />
        </id>
        <property name="nombreComercial" type="string">
            <column name="NOMBRE_COMERCIAL" length="100" not-null="true" />
        </property>
        <property name="codigoPrincipio" type="string">
            <column name="CODIGO_PRINCIPIO" length="50" not-null="true" />
        </property>
        <property name="stockMinimo" type="java.lang.Integer">
            <column name="STOCK_MINIMO" />
        </property>
        <property name="codigoLab" type="java.lang.Integer">
            <column name="CODIGO_LAB"  />
        </property>
        <property name="comentario" type="string">
            <column name="COMENTARIO" length="1000" />
        </property>
        <property name="existencias" type="java.lang.Integer">
            <column name="EXISTENCIAS"/>
        </property>
        <set name="labJoin"  fetch="join">          
            <key column="CODIGO_LAB" />
            <one-to-many class="com.mycompany.mavenproject1.Laboratorio"/>
        </set>
</class>

java-在这一个labJoin和labName是“Laboratorio”表上的字段

}

调用方法

private void displayResult(List rl){
            ArrayList<Object> oneRow = new ArrayList<Object>();
            for (Object o: rl){
                Medicamento medList = (Medicamento)o;
                System.out.println(labList.getCodigoLab());
                oneRow.add(medList.getCodigoMed());
                oneRow.add(medList.getExistencias());
                oneRow.add(medList.getNombreComercial());
                oneRow.add(medList.getLabJoin());
            }
            LowStockTableModel model = new LowStockTableModel(oneRow);
            try{
                jTable1.setModel(model);
            }
            catch (Exception e){
                JOptionPane.showMessageDialog(null, e.getLocalizedMessage(),"Error",JOptionPane.ERROR_MESSAGE);
                jTextField1.setText("");
            }
        }

private void displayResult（列表rl）{
ArrayList oneRow=新的ArrayList（）；
用于（对象o:rl）{
药物列表=（药物）o；
System.out.println（labList.getCodigoLab（））；
add（medList.getCodigoMed（））；
add（medList.getExistencias（））；
add（medList.getnombrecomeral（））；
add（medList.getLabJoin（））；
}
LowStockTableModel=新的LowStockTableModel（oneRow）；
试一试{
jTable1.setModel（model）；
}
捕获（例外e）{
showMessageDialog（null，例如getLocalizedMessage（），“Error”，JOptionPane.Error\u消息）；
jTextField1.setText（“”）；
}
}

在映射中，您有

<set name="labJoin"  fetch="join">          
        <key column="CODIGO_LAB" />
        <one-to-many class="com.mycompany.mavenproject1.Laboratorio"/>
    </set>

但是属性labJoin的类型为int。此属性的类型必须为

Set

private void displayResult(List rl){
            ArrayList<Object> oneRow = new ArrayList<Object>();
            for (Object o: rl){
                Medicamento medList = (Medicamento)o;
                System.out.println(labList.getCodigoLab());
                oneRow.add(medList.getCodigoMed());
                oneRow.add(medList.getExistencias());
                oneRow.add(medList.getNombreComercial());
                oneRow.add(medList.getLabJoin());
            }
            LowStockTableModel model = new LowStockTableModel(oneRow);
            try{
                jTable1.setModel(model);
            }
            catch (Exception e){
                JOptionPane.showMessageDialog(null, e.getLocalizedMessage(),"Error",JOptionPane.ERROR_MESSAGE);
                jTextField1.setText("");
            }
        }

<set name="labJoin"  fetch="join">          
        <key column="CODIGO_LAB" />
        <one-to-many class="com.mycompany.mavenproject1.Laboratorio"/>
    </set>