Java生成带Logo的二维码实现

 /**
     * 生成带logo的二维码
     * @param logoFile：logo图片刘
     * @param qrUrl:二维码内容
     * @return base64
     */
public static String createQRCode(InputStream logoFile,String qrUrl) {
        String base64Img = "";
        try {
            //设置二维码纠错级别ＭＡＰ
            Hashtable<EncodeHintType, ErrorCorrectionLevel> hintMap = new Hashtable<EncodeHintType, ErrorCorrectionLevel>();
            hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);  // 矫错级别
            QRCodeWriter qrCodeWriter = new QRCodeWriter();
            //创建比特矩阵(位矩阵)的QR码编码的字符串
            BitMatrix byteMatrix = qrCodeWriter.encode(qrUrl, BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE, hintMap);
            // 使BufferedImage勾画QRCode  (matrixWidth 是行二维码像素点)
            int matrixWidth = byteMatrix.getWidth();
            BufferedImage image = new BufferedImage(matrixWidth-80, matrixWidth-80, BufferedImage.TYPE_INT_RGB);
            image.createGraphics();
            Graphics2D graphics = (Graphics2D) image.getGraphics();
            graphics.setColor(Color.WHITE);
            graphics.fillRect(0, 0, matrixWidth, matrixWidth);
            // 使用比特矩阵画并保存图像
            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-40, j-40, 1, 1);
                    }
                }