如何在primefaces文件上传过程中传递参数 [英] how to pass the parameter during file upload in primefaces

问题描述

我使用jsf2.0与primfaces和使用p：fileupload上传照片..在这里我需要通过后台bean中的参数。在那里，没有选择通过p：fileupload传递参数..我也使用了绑定选项，但它返回的支持bean的空值...

这里是我的fileupload.xhtml

 < h：form enctype =multipart / form-data> 
  style =font-size：12px; height：499px> 
< p：messages id =messagesfor =imaload>< / p：messages> 
  {ngoPhotoUpload.photoUpload}
 mode =advancedmultiple =true
 immediate =true 
 update =messages
 allowTypes =/（\。| \ /）（gif | jpe？g | png）$ //> 
 
<！ - < p：growl life =1000id =messages/> - > 
 
< / p：面板> 
< / h：表格> 
  

这里是我的支持bean方法

<$ p公共无效的photoUpload（FileUploadEvent事件）抛出IOException，
InterruptedException {

BufferedImage bufferedImage;
String tmpFile = scontext.getRealPath（（/ ngoPhotos /）
+ event.getFile（）。getFileName（））;
文件结果=新文件（tmpFile）;

byte [] imageByte = event.getFile（）。getContents（）;

storeImage（imageByte，tmpFile）;

String imageName = event.getFile（）。getFileName（）;
String createdby = loginBean.getEmail（）;
$ b $ if（loginBean.getType（）。equals（admin）
|| loginBean.getType（）。equals（ngo_coordinator））{
if（ngoRegnPojo。 getNgo_id（）！= 0）{
ngoPhotoBean.setNgo_id（ngoRegnPojo.getNgo_id（））;
} else {
ngoPhotoBean.setNgo_id（loginBean.getUser_id（））;
}
} else {
ngoPhotoBean.setNgo_id（loginBean.getUser_id（））;
}

ngoPhotoBean.setImageName（imageName）;
ngoPhotoBean.status =status;
ngoPhotoBean.setCreatedDate（new Date（））;
ngoPhotoBean.setCreatedby（createdby）;
//ngoPhotoBean.setPathName(tmpFile）;
ngoPhotoBean.disable =false;
bufferedImage = ImageIO.read（result）;
if（bufferedImage.getWidth（）< = 400& amp; bufferedImage.getHeight（）< = 400）{

ngoPhotoBean.disable =false;
getMthd（imageByte，tmpFile）;

} else {

try {

ngoPhotoBean.disable =false;
bufferedImage = ImageIO.read（result）;
ImageIO.write（resize（bufferedImage，400，400），jpg，new File（
tmpFile））;
photoUploadDaoService.uploadNgoPhoto（ngoPhotoBean）;
NgoPhotoBean ngoPhotoBean = new NgoPhotoBean（）;
FacesContext.getCurrentInstance（）。getExternalContext（）
.getSessionMap（）。put（ngoPhotoBean，ngoPhotoBean）;
FacesMessage msg =新的FacesMessage（成功上传）;

FacesContext.getCurrentInstance（）。addMessage（null，msg）;

catch（Exception e）{
e.printStackTrace（）;
FacesMessage错误=新的FacesMessage（
FacesMessage.SEVERITY_ERROR，
文件没有上传！，）;
FacesContext.getCurrentInstance（）。addMessage（null，error）;





$ p

预先致谢

解决方案

您可以使用 p：remotecommand ，例如在fileupload的oncomplete中可以调用p ：远程命令并调用传递参数的函数。我在我的项目中做了类似的工作，它工作得很好。

I am using jsf2.0 with primfaces and using p:fileupload for uploading the photo..Here i need to pass the parameter in backing bean. In that there is no option for passing parameter through p:fileupload.. i was used the binding option also,but it returns the null value on backing bean...

here is my fileupload.xhtml

   <h:form  enctype="multipart/form-data">
            <p:panel  header="Upload Photos" id="getImageId" 
             style="font-size:12px;height:499px">
            <p:messages id="messages" for="imaload"></p:messages>
                 <p:fileUpload id="imaload" fileUploadListener="#  
       {ngoPhotoUpload.photoUpload}"  
                           mode="advanced"  multiple="true"   
     immediate="true"
                          update="messages" 
                           allowTypes="/(\.|\/)(gif|jpe?g|png)$/"/>

                 <!--  <p:growl life="1000" id="messages"/>   -->

            </p:panel>
        </h:form>

here is my backing bean method

public void photoUpload(FileUploadEvent event) throws IOException,
        InterruptedException {

    BufferedImage bufferedImage;
    String tmpFile = scontext.getRealPath(("/ngoPhotos/")
            + event.getFile().getFileName());
    File result = new File(tmpFile);

    byte[] imageByte = event.getFile().getContents();

    storeImage(imageByte, tmpFile);

    String imageName = event.getFile().getFileName();
    String createdby = loginBean.getEmail();

    if (loginBean.getType().equals("admin")
            || loginBean.getType().equals("ngo_coordinator")) {
        if (ngoRegnPojo.getNgo_id() != 0) {
            ngoPhotoBean.setNgo_id(ngoRegnPojo.getNgo_id());
        } else {
            ngoPhotoBean.setNgo_id(loginBean.getUser_id());
        }
    } else {
        ngoPhotoBean.setNgo_id(loginBean.getUser_id());
    }

    ngoPhotoBean.setImageName(imageName);
    ngoPhotoBean.status = "status";
    ngoPhotoBean.setCreatedDate(new Date());
    ngoPhotoBean.setCreatedby(createdby);
    //ngoPhotoBean.setPathName(tmpFile);
    ngoPhotoBean.disable = "false";
    bufferedImage = ImageIO.read(result);
    if (bufferedImage.getWidth() <= 400 && bufferedImage.getHeight() <= 400) {

        ngoPhotoBean.disable = "false";
        getMthd(imageByte, tmpFile);

    } else {

        try {

            ngoPhotoBean.disable = "false";
            bufferedImage = ImageIO.read(result);
            ImageIO.write(resize(bufferedImage, 400, 400), "jpg", new File(
                    tmpFile));
            photoUploadDaoService.uploadNgoPhoto(ngoPhotoBean);
            NgoPhotoBean ngoPhotoBean = new NgoPhotoBean();
            FacesContext.getCurrentInstance().getExternalContext()
                    .getSessionMap().put("ngoPhotoBean", ngoPhotoBean);
            FacesMessage msg = new FacesMessage("Successfully Uploaded");

            FacesContext.getCurrentInstance().addMessage(null, msg);

        } catch (Exception e) {
            e.printStackTrace();
            FacesMessage error = new FacesMessage(
                    FacesMessage.SEVERITY_ERROR,
                    "The files were not uploaded!", "");
            FacesContext.getCurrentInstance().addMessage(null, error);
        }
    }
}

Thanks in advance

解决方案

You can use a p:remotecommand, for example with the oncomplete of the fileupload you can call the p:remote command and call a function passing the parameter. I did something similar in my proyect and it work pretty good.

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