code: static void exportModel() throws Exception {
      HttpClient client = new HttpClient();
      GetMethod get = new GetMethod(URL + "/2/ExportModel.json?model=MyInitialNeuralNet");
      int status = client.executeMethod(get);
      if( status != 200 )
        throw new Exception(get.getStatusText());
      JsonObject response = (JsonObject) new JsonParser().parse(new InputStreamReader(get.getResponseBodyAsStream()));
      JsonElement model = response.get("model");
      JsonWriter writer = new JsonWriter(new FileWriter(JSON_FILE));
      writer.setLenient(true);
      writer.setIndent("  ");
      Streams.write(model, writer);
      writer.close();
      get.releaseConnection();
    }
docs: Exports a model to a JSON file.