Input and Output binary streams using JERSEY?

I managed to get a ZIP file or a PDF file by extending the StreamingOutput object. Here is some sample code:

@Path("PDF-file.pdf/")@GET@Produces({"application/pdf"})public StreamingOutput getPDF() throws Exception {    return new StreamingOutput() {        public void write(OutputStream output) throws IOException, WebApplicationException {            try {                PDFGenerator generator = new PDFGenerator(getEntity());                generator.generatePDF(output);            } catch (Exception e) {                throw new WebApplicationException(e);            }        }    };}

The PDFGenerator class (my own class for creating the PDF) takes the output stream from the write method and writes to that instead of a newly created output stream.

Don't know if it's the best way to do it, but it works.

I had to return a rtf file and this worked for me.

// create a byte array of the file in correct formatbyte[] docStream = createDoc(fragments); return Response            .ok(docStream, MediaType.APPLICATION_OCTET_STREAM)            .header("content-disposition","attachment; filename = doc.rtf")            .build();

I'm using this code to export excel (xlsx) file ( Apache Poi ) in jersey as an attachement.

@GET@Path("/{id}/contributions/excel")@Produces("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet")public Response exportExcel(@PathParam("id") Long id)  throws Exception  {    Resource resource = new ClassPathResource("/xls/template.xlsx");    final InputStream inp = resource.getInputStream();    final Workbook wb = WorkbookFactory.create(inp);    Sheet sheet = wb.getSheetAt(0);    Row row = CellUtil.getRow(7, sheet);    Cell cell = CellUtil.getCell(row, 0);    cell.setCellValue("TITRE TEST");    [...]    StreamingOutput stream = new StreamingOutput() {        public void write(OutputStream output) throws IOException, WebApplicationException {            try {                wb.write(output);            } catch (Exception e) {                throw new WebApplicationException(e);            }        }    };    return Response.ok(stream).header("content-disposition","attachment; filename = export.xlsx").build();}