//подготовка к скачиванию файла
    public void prepareFileToDownLoad(Filescommon filescommon) {
                
        byte[] buf = filescommon.getFiledata();
        ByteArrayInputStream bis = new ByteArrayInputStream(buf);
        String fn = filescommon.getFilename()+ filescommon.getFileras();
        String title = "filename";
        
        try {
            // Encoding
            title = URLEncoder.encode(fn, "UTF-8").replaceAll("\\+", "%20");
            FacesContext fc = FacesContext.getCurrentInstance();
            ExternalContext ec = fc.getExternalContext();
            ec.responseReset();
            ec.setResponseCharacterEncoding("UTF-8");
            ec.setResponseContentType("image/jpg");

            ec.setResponseHeader("Content-Disposition", "attachment; filename*=\"utf8'ru-ru'"+ title + "\""); 
                        
            fc.responseComplete();
                       
            
            
        } catch (UnsupportedEncodingException e1) {         
            e1.printStackTrace();
        }
       

        downLoadFile = new DefaultStreamedContent(bis, "image/jpg", title);

    }

//подготовка к скачиванию файла
    public void prepareFileToDownLoad(Filescommon filescommon) {

        byte[] buf = filescommon.getFiledata();
        ByteArrayInputStream bis = new ByteArrayInputStream(buf);
        String fn = filescommon.getFilename() + filescommon.getFileras();
        String title = "filename";

        try {
            // Encoding
            title = URLEncoder.encode(fn, "UTF-8").replaceAll("\\+", "%20");            
            FacesContext fc = FacesContext.getCurrentInstance();
            ExternalContext ec = fc.getExternalContext();            
            HttpServletRequest request = (HttpServletRequest) ec.getRequest();
            String ua = request.getHeader("User-Agent");
            title = ua.contains("Firefox") ? MimeUtility.encodeWord(fn) : title;

        } catch (UnsupportedEncodingException e1) {
            e1.printStackTrace();
        }
        downLoadFile = new DefaultStreamedContent(bis, "image/jpg", title);
    }