相关疑难解决方法(0)

我的.xhtml数据库看起来像这样:

<p:dataTable var="category" value="#{beanView.categories}" paginator="true" rows="5" 
 paginatorTemplate="{RowsPerPageDropdown} {FirstPageLink} {PreviousPageLink} {CurrentPageReport} {NextPageLink} {LastPageLink}"
 rowsPerPageTemplate="5,10" id="categoryDT" styleClass="categoryClass"    
 editable="true" lazy="false" rowKey="#{category.id}">
 <!-- columns -->
<f:facet name="footer">
    <p:commandButton id="btnNewCat" 
      oncomplete="jQuery('.categoryClass').find('span.ui-icon-pencil').last().click();" 
    actionListener="#{beanView.onNewCategory}" 
    update="categoryDT" icon="ui-icon-plus" title="New Category" value="New Category" ></p:commandButton>
</f:facet></p:dataTable>

而我的bean beanView:

public void onNewCategory(final ActionEvent actionEvent) {

    try {
        int rowCount = dataTable.getRowCount();
        int rowsPerPage = dataTable.getRows();
        int lastPage = rowCount / rowsPerPage;
        int rowFirst = (lastPage * rowsPerPage);

        if (rowCount >= rowsPerPage) {
            dataTable.setFirst(rowFirst);
            dataTable.setPageLinks(lastPage + 1);
            dataTable.setRowIndex(rowCount - 1);
        } else …