public static String transactionAdd() {
String url = DOMAIN_URL + TRANSACTION_ADD;
Map<String, Object> params = new TreeMap<String, Object>();
params.put("merchantNo", MERCHANT_NO);
params.put("storeNo", STORE_NO);
if (StringUtils.isNotEmpty(STORE_ADMIN_NO)) {
params.put("storeAdminNo", STORE_ADMIN_NO);
params.put("amount", "0.01");
String verifySign = verifySignHelper.getYuansferVerifySign(params, YUANSFER_TOKEN);
params.put("verifySign", verifySign);
String ret = HttpClientUtils.post(url, null, params);
System.out.println("---transaction add----");
JSONObject retInfo = (JSONObject)JSONValue.parse(ret);
JSONObject transaction = (JSONObject)retInfo.get("transaction");
String transactionNo = transaction.get("transactionNo").toString();