@Named
@RequestScoped
public class FileUploadView {
    
    private UploadedFile file;
    private UploadedFiles files;

    public UploadedFile getFile() {
        return file;
    }

    public void setFile(UploadedFile file) {
        this.file = file;
    }

    public UploadedFiles getFiles() {
        return files;
    }

    public void setFiles(UploadedFiles files) {
        this.files = files;
    }

    public void upload() {
        if (file != null) {
            FacesMessage message = new FacesMessage("Successful", file.getFileName() + " is uploaded.");
            FacesContext.getCurrentInstance().addMessage(null, message);
        }
    }
    
    public void uploadMultiple() {
        if (files != null) {
            for (UploadedFile f : files.getFiles()) {
                FacesMessage message = new FacesMessage("Successful", f.getFileName() + " is uploaded.");
                FacesContext.getCurrentInstance().addMessage(null, message);
            }
        }
    }
    
    public void handleFileUpload(FileUploadEvent event) {
        FacesMessage msg = new FacesMessage("Successful", event.getFile().getFileName() + " is uploaded.");
        FacesContext.getCurrentInstance().addMessage(null, msg);
    }
}