Java生产二维码

1.添加依赖

        
            com.google.zxing
            core
            3.3.0
        
        
            com.google.zxing
            javase
            3.3.0
        

二维码生产工具类

    private static void generateQRCodeImage(String text, int width, int height, String filePath) throws WriterException, IOException {
        //生成二维码类
        QRCodeWriter qrCodeWriter = new QRCodeWriter();
        //生成的二维码
        BitMatrix bitMatrix = qrCodeWriter.encode(text, BarcodeFormat.QR_CODE, width, height);
        //生产UUID
        String s = UUID.randomUUID().toString();
        //去掉“-”符号
        String s1 = s.substring(0, 8) + s.substring(9, 13) + s.substring(14, 18) + s.substring(19, 23) + s.substring(24);
        //生产UUID当做生产照片的名字
        String uuid=s1+".png";
        //路径+照片名称
        String filePaths = filePath + uuid;
        //二维码输出地址
        Path path = FileSystems.getDefault().getPath(filePaths);
        //输出二维码图片
        MatrixToImageWriter.writeToPath(bitMatrix, "PNG", path);

    }

调用二维码工具类生产二维码到D盘

 public static void main(String[] args) {
        try {
            //二维码内的信息
            String info = "https://www.baidu.com";
            String path="D:";
            //调用二维码工具类接口
            generateQRCodeImage(info, 350, 350,path);
        } catch (WriterException e) {
            System.out.println("Could not generate QR Code, WriterException :: " + e.getMessage());
        } catch (IOException e) {
            System.out.println("Could not generate QR Code, IOException :: " + e.getMessage());
        }
    }