p:fileUpload method not fired - jsf

Question

I have a form with a p:fileUpload, and when I submit the form, all methods are not fired
This is my xhtml :
<h:form enctype="multipart/form-data">
<p:messages id="messages" showDetail="true"/>
<p:fileUpload value="#{uploadBean.file}" mode="simple" id="fileUploadId"/>
<p:commandButton value="Envoyer ce fichier" process="#form" update="messages fileUploadId" actionListener="#{uploadBean.upload}"/>
</h:form>
my bean :
public void setFile(final UploadedFile file)
{
System.out.println("Dans le setFile");
this.file = file;
}
public void upload()
{
System.out.println("Dans le upload");
System.out.println("Fichier : " + file.getFileName());
FacesContext.getCurrentInstance().addMessage(null, msg);
}
my web.xml :
<filter>
<filter-name>PrimeFaces FileUpload Filter</filter-name>
<filter-class>
org.primefaces.webapp.filter.FileUploadFilter
</filter-class>
</filter>
<filter-mapping>
<filter-name>PrimeFaces FileUpload Filter</filter-name>
<servlet-name>Faces Servlet</servlet-name>
</filter-mapping>
In the trace, I have just :
Infos: Dans le upload
Grave: Réception de «java.lang.NullPointerException» lors de l’invocation du listener d’action «#{uploadBean.upload}» du composant «j_idt11»
Grave: java.lang.NullPointerException
The method setFile() is not call...
Thanks
edit :
All the code of my bean :
import java.io.Serializable;
import javax.faces.application.FacesMessage;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ViewScoped;
import javax.faces.context.FacesContext;
import org.primefaces.event.FileUploadEvent;
import org.primefaces.model.UploadedFile;
#ManagedBean
#ViewScoped
public class UploadBean implements Serializable
{
/**
*
*/
private static final long serialVersionUID = 556636819990963651L;
private UploadedFile file;
public UploadedFile getFile()
{
System.out.println("Dans le getFile");
return file;
}
public void setFile(final UploadedFile file)
{
System.out.println("Dans le setFile");
this.file = file;
}
public void upload()
{
System.out.println("Dans le upload");
// System.out.println("Fichier : " + file.getFileName());
FacesMessage msg;
if (file == null)
{
msg = new FacesMessage(FacesMessage.SEVERITY_WARN, "Raté ! ", "Le fichier vaut null.");
System.out.println("la variable file : null");
}
else
{
msg = new FacesMessage("Ouép ! ", file.getFileName() + " is uploaded.");
System.out.println("Le nom du fichier uploader est : " + file.getFileName());
}
FacesContext.getCurrentInstance().addMessage(null, msg);
}
}

Answer 1

From what you provided, I think you have done correctly so far. However, there are still 2 things you need to take care of:
You need to download common-io & common-fileupload and import the .jar file into your Library folder.
You also need to make sure that there are no other filters in web.xml or any classes that are annotated with #WebFilter which may read the HttpServletRequest#getInputStream() before PrimeFaces's filter, because it can be read only once.

Answer 2

You are using prettyfaces too? Then try it (set dispatcher):
<filter-mapping>
<filter-name>PrimeFaces FileUpload Filter</filter-name>
<servlet-name>Faces Servlet</servlet-name>
<dispatcher>FORWARD</dispatcher>
</filter-mapping>

Answer 3

I had a similar issue, the form was not submitted and the setters methods were never called, add
<f:ajax event="change"/>
inside the component what u want to submit. also
"immediate=true"
on the component itself. Thought might be helpful to others..