如何将参数发送到 PrimeFaces fileUpload 中的 fileUploadListener [英] How to send parameter to fileUploadListener in PrimeFaces fileUpload

问题描述

当我创建模型时，我想为模型保存图像.我正在使用 PrimeFaces fileUpload 组件.当我保存图片时，我想知道特定图像指的是哪个模型.这就是为什么我需要将模型的 id 发送到支持 bean.

When I create a model I would like to save images for a model. I am using PrimeFaces fileUpload component. When I save pictures I want to know to which model particular image refers to. That's why I need to send id of a model to backing bean.

是否有可能将模型的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>

推荐答案

不是通过请求参数.您可以通过组件属性来实现.

Not via request parameters. You can do so via component attributes.

例如

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

与

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

这篇关于如何将参数发送到 PrimeFaces fileUpload 中的 fileUploadListener的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！