水印在谷歌应用引擎中动态创建pdf

Question

我们如何使用Java / Netbeans在谷歌应用引擎中动态创建pdf水印？ GAE不支持FileOutputStream。我尝试过PdfStamper，但它不支持FileOutputStream。 servlet代码在

之下

protected void doPost（HttpServletRequest请求，HttpServletResponse响应）     抛出ServletException，IOException，Exception {         String fileName =＆＃34; abc.pdf＆＃34 ;;         response.setContentType（＆＃34;应用/ PDF＆＃34）;         response.setHeader（＆＃34; Content-Disposition＆＃34;，＆＃34; inline; filename = \＆＃34;＆＃34; + fileName +＆＃34; \＆＃34;＆＃34;）;                 Document document = new Document（）;                 PdfWriter writer = PdfWriter.getInstance（document，response.getOutputStream（））;

            document.open();
            try {
                 Paragraph title1 = new Paragraph("Chapter 1", FontFactory.getFont(FontFactory.COURIER_OBLIQUE, 18, Font.BOLDITALIC, new CMYKColor(0, 255, 255,17)));
                    document.add(title1);
                    document.add(new Paragraph("Hi Namita, welcome to pdf generation"));
                    document.add(new Paragraph("Here we are creating pdf of records"));
                    document.add(new Paragraph("Please save records"));
          } catch (Exception e) {
                    e.printStackTrace();
            }
             document.close();
}