Servlet Handles the Downloading the Attachment

            File attachment = new File(getAttachmentDestDir(reviewCycle), fileName);
            if (attachment.exists()) {
                response.setContentType("application/x-download");
                response.setHeader("Content-Disposition", "attachment; filename=" + fileName);
                response.setHeader("Pragma", "public");
                response.setHeader("Cache-control", "must-revalidate");
                FileInputStream fileInputStream = new FileInputStream(attachment);
                byte[] buffer = new byte[1024];
                int byteCount = 0;
                ServletOutputStream outputStream = response.getOutputStream();
                while ((byteCount = fileInputStream.read(buffer)) >= 0) {
                    outputStream.write(buffer, 0, byteCount);
                }
                outputStream.flush();
                outputStream.close();
                fileInputStream.close();
            }