How to use PrimeFaces p:fileUpload? Listener method is never invoked or UploadedFile is null / throws an error / not usable

Question

I\'m trying to upload a file using PrimeFaces, but the fileUploadListener method isn\'t being invoked after the upload finishes.

Here is the view:

Answer 1

bean.xhtml

Bean.java

@ManagedBean

@ViewScoped public class Submission implements Serializable {

private UploadedFile file;

//Gets
//Sets

public void uploadFasta(FileUploadEvent event) throws FileNotFoundException, IOException, InterruptedException {

    String content = IOUtils.toString(event.getFile().getInputstream(), "UTF-8");

    String filePath = PATH + "resources/submissions/" + nameOfMyFile + ".pdf";

    MyFileWriter.writeFile(filePath, content);

    FacesMessage message = new FacesMessage(FacesMessage.SEVERITY_INFO,
            event.getFile().getFileName() + " is uploaded.", null);
    FacesContext.getCurrentInstance().addMessage(null, message);

}

}

web.xml

    
    Faces Servlet
    *.xhtml


    PrimeFaces FileUpload Filter
    org.primefaces.webapp.filter.FileUploadFilter


    PrimeFaces FileUpload Filter
    Faces Servlet