如何在PrimeFaces fileUpload中将参数发送到fileUploadListener

Question

当我创建模型时,我想保存模型的图像.我正在使用PrimeFaces fileUpload组件.当我保存图片时,我想知道特定图像所指的模型.这就是我需要将模型的id发送到支持bean的原因.

有没有可能将模型的id发送到fileUploadListener？

<h:form enctype="multipart/form-data">
  <p:panelGrid columns="2">
    <h:outputLabel for="hotelName" value="#{msg.hotelName}"/>
    <p:inputText value="#{apartmentNew.name}" id="hotelName"/>
    <h:outputLabel for="hotelDescription" value="#{msg.hotelDescription}"/>
    <p:inputText value="#{apartmentNew.description}" id="hotelDescription"/>
    <h:outputLabel for="hotelImages" value="#{msg.hotelImages}"/>
    <h:form enctype="multipart/form-data">
      <p:fileUpload id="hotelImages"
                    fileUploadListener="#{apartments.handleImageUpload}"
                    mode="advanced"
                    sizeLimit="10000000"
                    allowTypes="/(\.|\/)(gif|jpe?g|png)$/">
      </p:fileUpload>
    </h:form>
  </p:panelGrid>
  <p:commandButton id="saveApartmentButton" value="#{msg.save}" action="save"/>
  <p:commandButton id="cancelCreationApartmentButton" value="#{msg.cancel}" 
     action="cancel"/>
</h:form>

Answer 1

不是通过请求参数.您可以通过组件属性执行此操作.

例如

<p:fileUpload ...>
    <f:attribute name="foo" value="bar" />
</p:fileUpload>

同

String foo = (String) event.getComponent().getAttributes().get("foo"); // bar