generate-qr-code

生成二维码

<!-- 二维码生成依赖 -->
<dependency>
    <groupId>com.google.zxing</groupId>
    <artifactId>core</artifactId>
    <version>3.4.1</version>
</dependency>



  // 1. sysUserId
            Base64.Encoder encoder = Base64.getEncoder();
            String randomCode = encoder.encodeToString(sysUserId.toString().getBytes());

            // 2. 生成二维码图片
            QRCodeWriter qrCodeWriter = new QRCodeWriter();
            BitMatrix bitMatrix = qrCodeWriter.encode(randomCode, BarcodeFormat.QR_CODE, width, height);

            // 3. 转换为字节数组
            ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
            MatrixToImageWriter.writeToStream(bitMatrix, "PNG", outputStream);
            byte[] qrCodeBytes = outputStream.toByteArray();
            // 4. 保存文件到服务器
//            OssFile ossFile = minioTemplate.fileUpload(qrCodeBytes, bucketName, "qrcode.png", FileContentType.PNG);
//            SysFile sysFile = new SysFile(ossFile);
//            sysFile.setSysUserId(userId);
//            sysFile.setFileType(FileType.QR_CODE.getFileType());
//            return sysFileRepository.save(sysFile);

            Base64Encoder encoder2 = new Base64Encoder();
            return encoder2.encode(qrCodeBytes);














/**
 * 文件上传
 *
 * @param bytes       字节流
 * @param originName  原始文件名
 * @param contentType con 类型
 * @return 文件对象
 */
public OssFile fileUpload(byte[] bytes, String bucketName, String originName, String contentType) {
    try {
        InputStream inputStream = new ByteArrayInputStream(bytes);

        // objectName不存在时生成新的
        String objectName = this.generatePathAndFileNameWithoutSuffix();

        // 构造参数
        ObjectWriteResponse response = this.minioClient.putObject(PutObjectArgs.builder()
                .bucket(bucketName)
                .object(objectName)
                .stream(inputStream, bytes.length, -1)
                .contentType(contentType)
                .build());

        OssFile fileInfo = new OssFile();
        fileInfo.setBucket(response.bucket());
        fileInfo.setObject(response.object());
        fileInfo.setFilename(originName);
        return fileInfo;
    } catch (Exception e) {
        e.printStackTrace();
        return null;
    }
}