private static void createQRImage(File qrFile, String qrCodeText, int size,
                                      String fileType) throws WriterException, IOException {
        // Create the ByteMatrix for the QR-Code that encodes the given String
        Hashtable hintMap = new Hashtable();
        hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
        QRCodeWriter qrCodeWriter = new QRCodeWriter();
        BitMatrix byteMatrix = qrCodeWriter.encode(qrCodeText,
                BarcodeFormat.QR_CODE, size, size, hintMap);
        // Make the BufferedImage that are to hold the QRCode
        int matrixWidth = byteMatrix.getWidth();
        BufferedImage image = new BufferedImage(matrixWidth, matrixWidth,
                BufferedImage.TYPE_INT_RGB);
        image.createGraphics();

        Graphics2D graphics = (Graphics2D) image.getGraphics();
        graphics.setColor(Color.WHITE);
        graphics.fillRect(0, 0, matrixWidth, matrixWidth);
        // Paint and save the image using the ByteMatrix
        graphics.setColor(Color.BLACK);

        for (int i = 0; i < matrixWidth; i++) {
            for (int j = 0; j < matrixWidth; j++) {
                if (byteMatrix.get(i, j)) {
                    graphics.fillRect(i, j, 1, 1);
                }
            }
        }
        ImageIO.write(image, fileType, qrFile);
    }