public class UploadToken  {    public static  String getUploadToken(Object object){        Gson gson=new Gson();        String jsonObject=gson.toJson(object);        String encodedPutPolicy = UrlSafeBase64.encodeToString(jsonObject);        String encodedSign="";        try {            encodedSign =hmacSha1(encodedPutPolicy);        }catch (Exception e){        }        String uploadToken = QiNiuConstant.ACCESSKEY + ":" + encodedSign + ":" + encodedPutPolicy;        return uploadToken;    }    public  static   String hmacSha1(final String base)            throws NoSuchAlgorithmException, InvalidKeyException {        String type = "HmacSHA1";        SecretKeySpec secret = new SecretKeySpec(QiNiuConstant.SECRETKEY.getBytes(), type);        Mac mac = Mac.getInstance(type);        mac.init(secret);        byte[] digest = mac.doFinal(base.getBytes());        return Base64.encodeToString(digest, Base64.URL_SAFE);    }其中Object的為：public class ImagePutPolicy implements Serializable {    private String scope;    private long deadline;    private ReturnBody returnBody;    public ImagePutPolicy(String fileName) {        scope = QiNiuConstant.SAVESPACE+":"+fileName;    }    public long getDeadline() {        return deadline;    }    public void setDeadline(long deadline) {        this.deadline = System.currentTimeMillis()/1000+deadline;    }    public ReturnBody getReturnBody() {        return returnBody;    }    public void setReturnBody(ReturnBody returnBody) {        this.returnBody = returnBody;    }}上傳代碼為  private void simpleUpload() {        ImagePutPolicy putPolicy=new ImagePutPolicy(key);        putPolicy.setDeadline(3600);        token=UploadToken.getUploadToken(putPolicy);        byte[] data=new byte[]{ 0, 1, 2, 3};