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

当我创建一个模型，我想保存一个模型的图像。我正在使用PrimeFaces fileUpload组件。当我保存图片时，我想知道特定图片指向哪个模型。这就是为什么我需要发送模型的id到后台bean。

有没有可能将模型的 id 发送到<
$ b

 < h：form enctype =multipart / form-datafileUploadListener  > 
< p：panelGrid columns =2> 
< h：outputLabel for =hotelNamevalue =＃{msg.hotelName}/> 
< p：inputText value =＃{apartmentNew.name}id =hotelName/> 
< h：outputLabel for =hotelDescriptionvalue =＃{msg.hotelDescription}/> 
< p：inputText value =＃{apartmentNew.description}id =hotelDescription/> 
< h：outputLabel for =hotelImagesvalue =＃{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：表格> 
< / p：panelGrid> 
< p：commandButton id =saveApartmentButtonvalue =＃{msg.save}action =save/> 
< p：commandButton id =cancelCreationApartmentButtonvalue =＃{msg.cancel}
 action =cancel/> 
< / h：表格> 
  

解决方案

不通过请求参数。例如

 < / p> p：fileUpload ...> 
 < / p：fileUpload> 
  

与

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

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.

Is there any possibility to send id of model to 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>

解决方案

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

E.g.

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

with

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

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