图片流输出问题，已设置了ContentType

        try

        {

            FtpClient ftpClient = new FtpClient();

            ftpClient.openServer("127.0.0.1", 21);

            ftpClient.login("test", "test");

            // if (path.length() != 0)

            // ftpClient.cd(path);

            ftpClient.binary();

            TelnetInputStream is = ftpClient.get("11.JPG");

            ServletOutputStream bos = null;

            HttpServletResponse response = getResponse();//获取Response

            response.reset();

            response.setContentType("image/jpeg");

            response.addHeader("Content-Disposition",

                    "attachment;filename=\"11.jpg\"");

            bos = response.getOutputStream();

            byte[] ary4buffer = new byte[4096];

            for (int iBytesRead = is.read(ary4buffer); -1 != iBytesRead; iBytesRead = is

                    .read(ary4buffer))

            {

                bos.write(ary4buffer, 0, iBytesRead);

            }

            bos.flush();

            bos.close();

            ftpClient.closeServer();

        }

        catch (SocketException ex)

        {

            logger.error(ex);

        }

        catch (IOException ex)

        {

            logger.error(ex);

        }