public void img(HttpServletRequest req, HttpServletResponse res) {

        //res.setHeader("Content-Type", "image/jpeg");

        //String reportType = req.getParameter("reportType");

        String reportIdstr = req.getParameter("reportIdstr");

        String pageIdstr = req.getParameter("pageIdstr");

        String dataKey = req.getParameter("dataKey");

        FbReportData data = null;

        try {

            data = this.fbReportDataService.findByReportIdAndPageIdAndDataKey(reportIdstr, pageIdstr, dataKey);

        } catch (Exception e) {

            e.printStackTrace();

        }

        if(data!=null){

            InputStream in = new ByteArrayInputStream(data.getData_value());

            try {

                OutputStream out = res.getOutputStream();

                byte[] b = new byte[in.available()];

                in.read(b);

                out.write(b);

                out.flush();

                in.close();

            } catch (IOException e) {

                e.printStackTrace();

            }

        }

    }