JSF f：ajax无法在上下文中找到组件

您可以将组件绑定到视图，然后

UIComponent#getClientId()

render

<h:panelGroup id="painelTabelaAPDespesa" binding="#{painel}">    <p:dataTable id="tabelaAPDespesa" value="#{itensAPDespesa.itens}" var="item">        ...        <f:ajax render=":#{painel.clientId}" ... />        ...    </p:dataTable></h:panelGroup>