图片存储

 public void upload(){
       //构造一个带指定 Region 对象的配置类
       Configuration cfg = new Configuration(Region.huanan());
       UploadManager uploadManager = new UploadManager(cfg);
       //生成上传凭证，然后准备上传
       String accessKey = "xxx";
       String secretKey = "xxx";
       //存储空间
       String bucket = "xxx";
       //如果是Windows情况下，格式是 D:\\qiniu\\test.png
       String localFilePath = "F:\\2021.jpg";
       //默认不指定key的情况下，以文件内容的hash值作为文件名
       String key = null;

       Auth auth = Auth.create(accessKey, secretKey);
       String upToken = auth.uploadToken(bucket);

       try {
           Response response = uploadManager.put(localFilePath, key, upToken);
           //解析上传成功的结果
           DefaultPutRet putRet = new Gson().fromJson(response.bodyString(), DefaultPutRet.class);
           System.out.println(putRet.key);
           System.out.println(putRet.hash);
       } catch (QiniuException ex) {
           Response r = ex.response;
           System.err.println(r.toString());
           try {
               System.err.println(r.bodyString());
           } catch (QiniuException ex2) {
               //ignore
           }
       }
   }

 public void download() {
       String fileName = "xxx"; //不需要文件后缀
       String domainOfBucket = "http://xxx.com";
       try {
           String encodedFileName = URLEncoder.encode(fileName, "utf-8").replace("+", "%20");
           String publicUrl = String.format("%s/%s", domainOfBucket, encodedFileName);
           String accessKey = "xxx";
           String secretKey = "xxx";
           Auth auth = Auth.create(accessKey, secretKey);
           long expireInSeconds = 3600;//1小时，可以自定义链接过期时间
           String finalUrl = auth.privateDownloadUrl(publicUrl, expireInSeconds);
           System.out.println(finalUrl);
       } catch (UnsupportedEncodingException e) {
           e.printStackTrace();
       }
   }