二维码生成和读取

public class Test {
    public static void main(String[] strings) {
        Test test = new Test();
        test.CreateQrCodevoid("dsc", "D:/", "12306bypass");
        test.ReadQrCode("D:/12306bypass/1546931302959_423.png");
    }

    /**
     * 生成二维码
     * @param content 内容
     * @param filePath 生成的二维码存放的位置
     */
    public String CreateQrCodevoid(String content, String rootPath, String filePath) {
        int width = 300;
        int height = 300;
        String format = "png";
        //定义二维码的参数
        HashMap map = new HashMap();
        //设置编码
        map.put(EncodeHintType.CHARACTER_SET, "utf-8");
        //设置纠错等级
        map.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
        map.put(EncodeHintType.MARGIN, 2);
        String fileName = null;
        try {
            //生成二维码
            BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height);
            //判断文件夹是否存在，不存在则创建
            String fullPath = rootPath+filePath;
            File file1 = new File(fullPath);
            if(!file1 .exists()  && !file1 .isDirectory()){
                file1 .mkdirs();
            }
            //新的文件名
            fileName = content + System.currentTimeMillis()+"_"+new Random().nextInt(1000)+".png";
            //包含文件名的全路径
            String fileFolder = fullPath + "/" +fileName;
            Path file = new File(fileFolder).toPath();
            MatrixToImageWriter.writeToPath(bitMatrix, format, file);
        } catch (WriterException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return fileName;
    }


    /**
     * 读取二维码
     * @param path 存放二维码的全路径
     * @return
     */
    public Result ReadQrCode(String path) {
        Result result = null;
        try {
            MultiFormatReader multiFormatReader = new MultiFormatReader();
            File file = new File(path);
            BufferedImage image = ImageIO.read(file);
            //定义二维码参数
            Map hints = new HashMap();
            hints.put(EncodeHintType.CHARACTER_SET, "utf-8");

            //获取读取二维码结果
            BinaryBitmap binaryBitmap = new BinaryBitmap(new HybridBinarizer(new BufferedImageLuminanceSource(image)));
            result = multiFormatReader.decode(binaryBitmap, hints);

            System.out.println("读取二维码： " + result.toString());
            System.out.println("二维码格式： " + result.getBarcodeFormat());
            System.out.println("二维码内容： " + result.getText());
        } catch (NotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return result;
    }

}