java实现微信公众号发送模版消息

{{first.DATA}} 
用户名：{{keyword1.DATA}} 
订单号：{{keyword2.DATA}} 
订单金额：{{keyword3.DATA}} 
商品信息：{{keyword4.DATA}} 
{{remark.DATA}}

public void sendOrderTemplateMessage(Order order) {
  AugeWechatUser wechatUser = augeWechatUserMapper.selectByPhone(order.getPhone());
  String goodsInfo = "";
  for (AugeSaleItem augeSaleItem : order.getData()) {
    goodsInfo += augeSaleItem.getItemName() + "×" + augeSaleItem.getItemNum() + "\n\t\t\t";
  }
  DataInfo first = new DataInfo("恭喜你购买成功！", "#ff0000");
  DataInfo keyword1 = new DataInfo(wechatUser.getNickName(), "#ff0000");
  DataInfo keyword2 = new DataInfo(order.getOrderNumber(), "#ff0000");
  DataInfo keyword3 = new DataInfo("￥" + order.getSumPrice() + "元", "#ff0000");
  DataInfo keyword4 = new DataInfo(goodsInfo, "#ff0000");
  DataInfo remark = new DataInfo("欢迎再次购买！", "#000000");

  OrderData orderData = new OrderData(first, keyword1, keyword2, keyword3, keyword4, remark);
  OrderTemplateMessage templateMessage = new OrderTemplateMessage();
  templateMessage.setTouser(wechatUser.getId());
  templateMessage.setTemplate_id(orderTemplateId);//模版ID
  templateMessage.setData(orderData);

  OkHttpUtil.getInstance().doPost(WechatConstant.getTemplateUrl(wechatAccessTokenService.takeAccessToken()), 
JSON.toJSONString(templateMessage));
}

public String doPost(String url, String param) {
    MediaType );
    RequestBody body = RequestBody.create(JSON, param);
    Request request = new Request.Builder()
        .url(url)
        .post(body)
        .build();
    Call call = okHttpClient.newCall(request);
    try {
      Response response = call.execute();
      return response.body().string();
    } catch (IOException e) {
      e.printStackTrace();
    }
    return null;
  }

 @Value("#{setting.ordertemplateid}")
 private String orderTemplateId;