Jsf 使用LazyDataModel分页时，选定的rowkey为空

我使用的是PrimeFaces5.0。我已经实现了LazyDataModel，并且能够加载行，但是，当我分页时，会调用getRowDataString rowKey，但rowKey为null。它在第一页上获得正确的键，但在我分页到下一页或上一页时总是空的

<p:dataTable id="sublTableId"
             value="#{submissionListBean.lazyModel}"
             var="selRow"
             selectionMode="single"
             selection="#{submissionListBean.selectedSubmissionListRec}"
             resizableColumns="true"
             paginator="true"
             rows="50"
             paginatorPosition="both"
             paginatorAlwaysVisible="true"
             scrollable="true"
             scrollHeight="300px;"
             scrollWidth="100px;"
             frozenColumns="5"
             paginatorTemplate="{PreviousPageLink} {NextPageLink}"
             lazy="true"
             rowIndexVar="rowIndex">

    <p:ajax event="rowSelect"
            update=":submissionListForm:thrdListBtn"
            listener="#{submissionListBean.onRowSelect}"/>

LazySubmissionListDataModel.java

public class LazySubmissionListDataModel extends LazyDataModel<AuditSubmissionListDto> {

    private static final long serialVersionUID = 429415464812534969L;
    private List<AuditSubmissionListDto> datasource;
    private AuditSubmissionListDto request;
    private IAuditService auditService;
    private CmUserContext userContext;

    int startPage = 1;
    int totalRowCount;

    public LazySubmissionListDataModel(CmUserContext userContext, IAuditService auditService,
            AuditSubmissionListDto request) {
        this.auditService = auditService;
        this.userContext = userContext;
        this.request = request;
    }

    @Override
    public List<AuditSubmissionListDto> load(int first, int pageSize, String sortField, SortOrder sortOrder, Map<String, Object> filters) {

        datasource = new ArrayList<AuditSubmissionListDto>();

        // Calculate pages for pagination
        if (first == 0) {
            startPage = 1;
        } else {
            startPage = (first / pageSize) + 1;
        }

        // Call the service to get the resultlist
        try {

            datasource = getAuditService().getSubmissionListRecords(userContext, request, pageSize, startPage);

            if ((datasource != null) && (datasource.size() > 0)) {
                totalRowCount = datasource.get(0).getTotalRowsCount().intValue();
            }

            setRowCount(totalRowCount);
            setWrappedData(datasource);

        } catch (BesCmUiException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        return datasource;
    }

    @Override
    public AuditSubmissionListDto getRowData(String rowKey) {
        for (AuditSubmissionListDto dto : datasource) {
            if (dto.getSubmissionId().equals(rowKey)) {
                return dto;
            }
        }

        return null;
    }

    @Override
    public AuditSubmissionListDto getRowData() {
        // TODO Auto-generated method stub
        return super.getRowData();
    }

    @Override
    public String getRowKey(AuditSubmissionListDto dto) {
        return dto.getSubmissionId();
    }

    /*
     * (non-Javadoc)
     * @see org.primefaces.model.LazyDataModel#isRowAvailable()
     */
    @Override
    public boolean isRowAvailable() {
        // TODO Auto-generated method stub
        return super.isRowAvailable();
    }

    /*
     * (non-Javadoc)
     * @see org.primefaces.model.LazyDataModel#getRowCount()
     */
    @Override
    public int getRowCount() {
        // TODO Auto-generated method stub
        return super.getRowCount();
    }

    /*
     * (non-Javadoc)
     * @see org.primefaces.model.LazyDataModel#getRowIndex()
     */
    @Override
    public int getRowIndex() {
        // TODO Auto-generated method stub
        return super.getRowIndex();
    }

    /*
     * (non-Javadoc)
     * @see org.primefaces.model.LazyDataModel#setRowIndex(int)
     */
    @Override
    public void setRowIndex(int rowIndex) {
        // TODO Auto-generated method stub
        super.setRowIndex(rowIndex);
    }

    /*
     * (non-Javadoc)
     * @see org.primefaces.model.LazyDataModel#setWrappedData(java.lang.Object)
     */
    @Override
    public void setWrappedData(Object list) {
        // TODO Auto-generated method stub
        super.setWrappedData(list);
    }

    /*
     * (non-Javadoc)
     * @see org.primefaces.model.LazyDataModel#getPageSize()
     */
    @Override
    public int getPageSize() {
        // TODO Auto-generated method stub
        return super.getPageSize();
    }

    /*
     * (non-Javadoc)
     * @see org.primefaces.model.LazyDataModel#getWrappedData()
     */
    @Override
    public Object getWrappedData() {
        // TODO Auto-generated method stub
        return super.getWrappedData();
    }

    /*
     * (non-Javadoc)
     * @see org.primefaces.model.LazyDataModel#setPageSize(int)
     */
    @Override
    public void setPageSize(int pageSize) {
        // TODO Auto-generated method stub
        super.setPageSize(pageSize);
    }
}

---

最后，我终于找到了问题所在。xhtml中的frozenColumn属性将rowkey设置为。我也能够用Primefaces showcase中给出的标准汽车的例子来复制它。如果有人知道这是否有一个解决方案，如果你能友好地张贴感谢。 谢谢

.xhtml

<p:dataTable var="car" value="#{tableBean.lazyModel}" paginator="true" rows="10" lazy="true"  
paginatorTemplate="{RowsPerPageDropdown} {FirstPageLink} {PreviousPageLink} 
{CurrentPageReport}{NextPageLink} {LastPageLink}"  
rowsPerPageTemplate="5,10,15"  
selection="#{tableBean.selectedCar}" selectionMode="single" 
scrollable="true" frozenColumns="1">
 <p:ajax event="rowSelect"  listener="#{tableBean.onRowSelect}" />

---

您已经覆盖了bean中的所有方法，而没有绝对的需要，这会使您的代码变得不必要的混乱。除非绝对有必要重写这些方法，否则就把它们去掉。在本例中，您只需执行rowKey={selRow.submissionId}-的一个属性。无需显式重写关联bean中的getRowKey方法。链接的帖子也相当混乱。将s与a结合使用的意图完全未明。使用a的积垢操作可以以相当整洁的方式执行/处理。您好，非常感谢您的回复。我添加了rowKey={selRow.submissionId}，并从LazySubmissionListDataModel.java中删除了所有被重写的方法，只保留了getter和setter，但所选行在RowSelect上仍然为null。托管Bean:public void onRowSelectSelectEvent事件{String actionName=ON_row_SELECT；log.debugSubmissionListBean:+actionName；try{AuditSubmissionListDToSelectedObj=AuditSubmissionListDtoevent.getObject；我在您的支持bean中找不到该侦听器方法。您是否有类似于public void onRowSelectSelectEvent事件{…}在您的支持bean中？请在PF中提交一个问题issuelist@Kukeltje，是的，我已在PF问题列表中提交和发布：问题7850：

<p:dataTable var="car" value="#{tableBean.lazyModel}" paginator="true" rows="10" lazy="true"  
paginatorTemplate="{RowsPerPageDropdown} {FirstPageLink} {PreviousPageLink} 
{CurrentPageReport}{NextPageLink} {LastPageLink}"  
rowsPerPageTemplate="5,10,15"  
selection="#{tableBean.selectedCar}" selectionMode="single" 
scrollable="true" frozenColumns="1">
 <p:ajax event="rowSelect"  listener="#{tableBean.onRowSelect}" />