[英]JSF Primefaces pass parameter to fileupload
JSF 2.2-Primefaces 4.0-JBoss Wildfly
嗨,我正在尝试将参数值传递给文件上传处理程序。 我尝试了一些发现的建议,但无法使其正常工作。
我退了几步
我需要控制器中的#{fileUploadController.newItemId}
转到文件更新页面时,即使用此URL /fileUpload.jsf?newItemId=10
我尝试了如何在PrimeFaces fileUpload中将参数发送到fileUploadListener并将参数 值通过PrimeFaces文件上传传递到支持bean中提到的内容
fileUpload.xhtml
<f:metadata>
<f:viewParam name="newItemId"
value="#{fileUploadController.newItemId}" />
<f:viewAction action="#{fileUploadController.loadData()}" />
</f:metadata>
<h:form id="item" enctype="multipart/form-data">
<p:messages id="messages" />
<p:panelGrid styleClass="panelGridCenter">
<p:row>
<p:column>
<p:fileUpload
fileUploadListener="#{fileUploadController.handleFileUpload}"
validator="#{fileUploadController.validateFile}" mode="advanced"
dragDropSupport="false" update="messages" sizeLimit="1000000"
fileLimit="100" allowTypes="/(\.|\/)(gif|jpe?g|png)$/">
</p:fileUpload>
</p:column>
</p:row>
</p:panelGrid>
</h:form>
FileUploadController.java
public void handleFileUpload(FileUploadEvent event) {
try {
// Need item id here :)
UploadedFile file = event.getFile();
InputStream inputStream = file.getInputstream();
FileOutputStream outputStream = new FileOutputStream(file.getFileName());
byte[] buffer = new byte[4096];
int bytesRead = 0;
while (true) {
bytesRead = inputStream.read(buffer);
if (bytesRead > 0) {
outputStream.write(buffer, 0, bytesRead);
} else {
break;
}
}
outputStream.close();
inputStream.close();
Long imageId = serviceSLSB.saveImage(itemId, file, buffer);
FacesMessage msg = new FacesMessage("Succesful", event.getFile().getFileName() + " is uploaded and saved with id." + imageId);
FacesContext.getCurrentInstance().addMessage(null, msg);
} catch (Exception e) {
String errorMessage = getRootErrorMessage(e);
FacesMessage m = new FacesMessage(FacesMessage.SEVERITY_ERROR, errorMessage, "Saving unsuccessful");
facesContext.addMessage(null, m);
}
}
public void loadData() {
if (newItemId == null) {
String message = "Bad request. Please use a link from within the system.";
FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(FacesMessage.SEVERITY_ERROR, message, null));
return;
} else {
String message = "Your are adding images to item with id : " + newItemId;
FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(FacesMessage.SEVERITY_INFO, message, null));
return;
}
}
我刚发现我的控制器在更改为
@ViewScoped @Named公共类FileUploadController实现可序列化
我的原因仍然是商品ID,现在可以向该商品添加图片了。
谢谢你们的评论
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