Implementation procedure

  1. The user initiates Alipay payment in the mobile browser.
  2. The merchant system calls the OTT Pay API to make payment, and the OTT Pay server returns Payment Link
  3. The merchant system direct to this Payment Link and Alipay wallet will be activated for payment
  4. The payment result will be notified to the merchant system through a callback

Code Example

Map<String, Object> data = new HashMap<>();
data.put("amount", "1");
data.put("callbackURL", "https://your.callback.url");
data.put("returnURL", "https://your.return.url");

Gson gson = new Gson();
RequestBody body = RequestBody.create(gson.toJson(data), MediaType.parse("application/json; charset=utf-8"));
String token = "eyJhbGciOiJIUzUxMiJ9.eyJzdWIiOiJPTjAwMDAwMDk3MTMwIiwiYXVkaWVuY2UiOm51bGwsInJvbGUiOm51bGwsImNyZWF0ZWQiOjE2NzgyMDE3OTU3NTQsInVzZXJ0eXBlIjoiQ1VTVE9NRVIiLCJleHAiOjE2NzgyMTA3OTUsInVzZXJpZCI6MTMwfQ.Y77IAPtuEhawmcBQl9E22g8G7oZYNKClZUgWD7J28wj9Z5Hq_cI3ESG_2nmD_Uma862Z1OX3dSjPpE0OF0LHGg";
Request request = new Request.Builder()
       .addHeader("Authorization", "Bearer " + token)

final OkHttpClient httpClient = new OkHttpClient();
try (Response response = httpClient.newCall(request).execute()) {

   if (!response.isSuccessful()) {
       throw new IOException("Unexpected code " + response);

   // Response
} catch (IOException e) {
   throw new RuntimeException(e);

The payInfo in the returned response is the payment link, the front-end will directly redirected to this link, and the Alipay wallet can be called for payment.