convert Bytes[] to StreamedContent fro download jsf2.0 primefaces3.3.1

[doinigly jaquel]

hello
I use primefaces and I want to download a file with different formats(pdf, jpg, png, ) from database but I don't succed to realise this I have seen a lot of topic like this but their methods don't work for me here is the html :

<ui:repeat value="#{histCommController.selectedCommande.listFichiers}" var="jjjjj">
                            <tr>
                                <td>
                                    <h:outputLabel style="font-weight: bold;" value="#{jjjjj.nom}" />
                                </td>
                                <td>
                                    <h:outputLabel style="font-weight: bold;" value="#{jjjjj.taille}" />
                                </td>
                                <td>
                                    <p:commandButton id="downloadLink" value="Download" ajax="false"   
                                                     icon="ui-icon-arrowthichk-s">  
                                        <p:fileDownload value="#{jjjjj.convertFichieru}" /> 
                                    </p:commandButton>
                                </td>
                            </tr>



                        </ui:repeat>

and here is the java :

public StreamedContent convertFichier(byte[] bytes) {
    InputStream is = new ByteArrayInputStream(bytes);
    System.out.println("size file : "+bytes.length);
    StreamedContent image = new DefaultStreamedContent(is);
    System.out.println("dans le convertisseur : "+image.getContentType());
    return image;
}

always, image.getContentType() return null and bytes.length not null

do you have any idea

thank you

[Tim Holloway]

JSF is designed to work with HTML, not PDF, MS-Word/Excel files or other non-HTML data.

Instead of trying to force JSF to output stuff it wasn't intended to output, you'll find it's cleaner to use a JSF h:outputLink element to reference a servlet URL. Let the servlet handle outputting the special-format data.