FileDownload

FileDownload is used to stream binary contents like files stored in database to the client. FileDownload is used by attaching it to any JSF command component like button or a link. Additionally presentation of download can be configured with the contentDisposition attribute that takes either "attachment" or "inline" as a value.

Documentation

Status

download.xhtml
FileDownloadView.java

<script type="text/javascript">
    //<![CDATA[
function start() {
    PF('statusDialog').show();
}

function stop() {
    PF('statusDialog').hide();
}
    //]]>
</script>    


<p:dialog modal="true" widgetVar="statusDialog" header="Status" draggable="false" closable="false" resizable="false">
    <p:graphicImage name="/demo/images/ajaxloadingbar.gif" />
</p:dialog>
<h:form>   
    <p:commandButton value="Download" ajax="false" onclick="PrimeFaces.monitorDownload(start, stop);" icon="pi pi-arrow-down">
        <p:fileDownload value="#{fileDownloadView.file}" />
    </p:commandButton>      
</h:form>

@Named
@RequestScoped
public class FileDownloadView {

    private StreamedContent file;

    public FileDownloadView() {
        file = DefaultStreamedContent.builder()
                .name("downloaded_boromir.jpg")
                .contentType("image/jpg")
                .stream(() -> FacesContext.getCurrentInstance().getExternalContext().getResourceAsStream("/resources/demo/images/boromir.jpg"))
                .build();
    }

    public StreamedContent getFile() {
        return file;
    }
}

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