Jsf primefaces datatable复合主键多重选择无效

我在使用primefaces datatable和复合主键的多重选择（复选框）时遇到问题 下面是我的xhtml

 <p:dataTable id="cars" var="car" value="#{setujutolakanpencairan.listmktksppencairan0}"
                     rowKey="#{car.mktksppencairan0PK}"
                     selection="#{setujutolakanpencairan.mktksppencairan0s}"   >
            <p:ajax event="rowSelectCheckbox" process="@this"/>
            <p:column selectionMode="multiple" style="width:2%" />
            <f:facet name="header">
                Click "View" button after selecting multiple to see details
            </f:facet>
            <p:column headerText="Color">
                #{car.vcKeterangan}
            </p:column>

            <f:facet name="footer">
                <p:commandButton value="View" icon="ui-icon-search"
                                 update=":form:display" oncomplete="carDialog.show()" actionListener="#{setujutolakanpencairan.outprint()}"/>
            </f:facet>
        </p:dataTable>

下面是显示数据的列表

public List<Mktksppencairan0> getListmktksppencairan0() {
    TypedQuery<Mktksppencairan0> query = em.createNamedQuery("Mktksppencairan0.findBybulantahun", Mktksppencairan0.class);
    query.setParameter(
            "iTahun", mktkontrol.getTahun());
    query.setParameter(
            "iBulan", mktkontrol.getBulan());
    List<Mktksppencairan0> results = query.getResultList();
    return results;
}

public void setListmktksppencairan0(List<Mktksppencairan0> listmktksppencairan0) {
    this.listmktksppencairan0 = listmktksppencairan0;
}

当我使用netbeans调试器进行调试时，结果是[]或0 当我说出结果时

INFO: asdfasdf ===[Lcom.infion.web.biaya_marketing.entity.Mktksppencairan0;@a20a9b
INFO: asdfasdf ===64

INFO: asdfasdf ===[Lcom.infion.web.biaya_marketing.entity.Mktksppencairan0;@1f5db6
INFO: asdfasdf ===[Lcom.infion.web.biaya_marketing.entity.Mktksppencairan0;@1f5db6

仅供参考，我正在使用netbeans 7.3、glassfish 3.1.2和primefaces 3.5 *我使用的实体是由netbean生成的，因此有两类实体Mktksppencairan0PK和Mktksppencairan0，其中Mktksppencairan0已添加了Mktksppencairan0PK 谢谢你帮助我

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注意：我曾尝试使用非复合主键（单个主键）及其工作方式，但当我尝试使用另一个复合主键时，它不工作

我遇到了相同的问题，但我始终使用实体列表

private List<SipreTmpGuardia> beanList;
private List<SipreTmpGuardia> beanListSelected;

---

您需要将selectionMode设置为“multiple”，正如@dmatos所提到的，rowkey必须为每一行返回唯一的标识符，并且需要保持一致。如果selectabledatamodel变得比访问rowKey中的唯一字段更复杂，则始终可以在primefaces中实现它

 public void outprint() {

    System.out.println("asdfasdf ===" + mktksppencairan0s.toString().length());
    System.out.println("asdfasdf ===" + mktksppencairan0s.toString());
    System.out.println("asdfasdf ===" + mktksppencairan0s);
    for (Mktksppencairan0 asdf : mktksppencairan0s) {
        System.out.println("mktksppencairan0s mktksppencairan0s mktksppencairan0smktksppencairan0s =====" + asdf.toString().length());
    }
}

INFO: asdfasdf ===[Lcom.infion.web.biaya_marketing.entity.Mktksppencairan0;@a20a9b
INFO: asdfasdf ===64

INFO: asdfasdf ===[Lcom.infion.web.biaya_marketing.entity.Mktksppencairan0;@1f5db6
INFO: asdfasdf ===[Lcom.infion.web.biaya_marketing.entity.Mktksppencairan0;@1f5db6

private List<SipreTmpGuardia> beanList;
private List<SipreTmpGuardia> beanListSelected;

    <!-- DATATABLE-->
                <p:dataTable id="dt" var="item" widgetVar="wdt"
                    rowIndexVar="rowIndex"
                    value="#{guardia.beanList}"
                    emptyMessage="#{constantesUtil.LIST_EMPTY}" paginator="true"
                    rows="20" paginatorPosition="top"
                    paginatorTemplate="{CurrentPageReport}  {FirstPageLink} {PreviousPageLink} {PageLinks} {NextPageLink} {LastPageLink} "
                    selection="#{guardia.beanListSelected}" rowKey="#{item.codigoRowIndexTemp}"
                      >
                    <p:column headerText="N*" width="1%">
                        <h:outputText value="#{rowIndex+1}" />
                    </p:column>
                    <p:column selectionMode="multiple"  width="1%"/>
                    <p:column headerText="Indicador Mes o Reintegro" width="2%">
                        <h:outputText value="#{item.ctgIndSituacion==2?'Reintegro':'Proceso Mes'}" />
                    </p:column>

                    <f:facet name="footer">
                <p:commandButton ajax="false" action="#{guardia.saveListTmpGuardia()}" update=":frm:messages,:frm:dt,:frm:dtGM" icon="ui-icon-search" value="Guardar Seleccionados"  />
        </f:facet>
                </p:dataTable>

@EmbeddedId
protected SipreTmpGuardiaPK sipreTmpGuardiaPK;