java boot 生成二維碼並上傳到阿里雲oss

 <!--aliyun oss-->
<dependency>
    <groupId>com.aliyun.oss</groupId>
    <artifactId>aliyun-sdk-oss</artifactId>
    <version>3.8.1</version>
</dependency>

<!--二維碼-->
<dependency>
    <groupId>com.google.zxing</groupId>
    <artifactId>core</artifactId>
    <version>3.3.3</version>
</dependency>
<dependency>
    <groupId>com.google.zxing</groupId>
    <artifactId>javase</artifactId>
    <version>3.3.3</version>
</dependency>

 

oss

@Component
public class AliyunOss {
    @Value("${oss.endpoint}")
    private String endpoint;
    @Value("${oss.bucketUrl}")
    private String bucketUrl;
    @Value("${oss.accessKeyId}")
    private String accessKeyId;
    @Value("${oss.accessKeySecret}")
    private String accessKeySecret;
    @Value("${oss.bucketName}")
    private String bucketName;

    public String ossUpload(MultipartFile file, String fileKey) throws IOException {
        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);
        PutObjectResult res = ossClient.putObject(bucketName, fileKey, new ByteArrayInputStream(file. getBytes()));
        ossClient.shutdown();
        if (res != null) {
            return fileKey;
        }
        return null;
    }

    public String ossUploadByteStream(String fileKey, byte[] bytes)
    {
        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);
        PutObjectRequest putObjectRequest = new PutObjectRequest(bucketName, fileKey, new ByteArrayInputStream(bytes));
        PutObjectResult res = ossClient.putObject(putObjectRequest);
        ossClient.shutdown();
        if (res != null) {
            return fileKey;
        }
        return null;
    }


    public Map<String, String> getPolicy(String dir) throws UnsupportedEncodingException {
        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);

        PolicyConditions policyConds = new PolicyConditions();
        policyConds.addConditionItem(PolicyConditions.COND_CONTENT_LENGTH_RANGE, 0, 1048576000);
        policyConds.addConditionItem(MatchMode.StartWith, PolicyConditions.COND_KEY, dir);

        long expireTime = 30;
        long expireEndTime = System.currentTimeMillis() + expireTime * 1000;
        Date expiration = new Date(expireEndTime);
        String postPolicy = ossClient.generatePostPolicy(expiration, policyConds);
        byte[] binaryData = postPolicy.getBytes("utf-8");
        String encodedPolicy = BinaryUtil.toBase64String(binaryData);
        String postSignature = ossClient.calculatePostSignature(postPolicy);

        Map<String, String> respMap = new LinkedHashMap<String, String>();
        respMap.put("accessid", accessKeyId);
        respMap.put("policy", encodedPolicy);
        respMap.put("signature", postSignature);
        respMap.put("dir", dir);
        respMap.put("fileName", UUID.randomUUID().toString());
        respMap.put("host", bucketUrl);
        respMap.put("expire", String.valueOf(expireEndTime / 1000));
        respMap.put("callback", "");

        ossClient.shutdown();
        return respMap;
    }

    public String getBucketUrl() {
        return bucketUrl;
    }
}

二維碼

public class Qrcode {

    public String getQrcode(String text, int width, int height, String filekey, AliyunOss oss) {

        try {
            ByteArrayOutputStream os = new ByteArrayOutputStream();

            QRCodeWriter qrCodeWriter = new QRCodeWriter();
            BitMatrix bitMatrix = qrCodeWriter.encode(text, BarcodeFormat.QR_CODE, width, height);
            MatrixToImageWriter.writeToStream(bitMatrix, "png", os);
            byte[] bytes = os.toByteArray();
            String url = oss.ossUploadByteStream(filekey, bytes);

            if (url == null) {
                return null;
            }
            return url;
        } catch (WriterException | IOException e) {
            e.printStackTrace();
            return null;
        }


    }

}