public void tradeClose(AcopayTradeCloseRequestModel tradeCloseRequestModel) {

  // 翼辉支付平台公钥
  String acopayPublicKey = "<acopayPublicKey>";
  // 商户私钥
  String mchPrivateKey = "<yourMchPrivateKey>";
  // 商户号
  String mchNo = "<yourMchNo>";
  try {
    // 创建 AcopayClient 实例
    AcopayClient acopayClient = new DefaultAcopayClient(acopayPublicKey, mchPrivateKey, mchNo);
    // 发送关单请求
    AcopayResponse<AcopayTradeCloseResponseModel> acopayTradeCloseAcopayResponse = acopayClient
      .tradeClose(tradeCloseRequestModel);
    // 判断请求是否成功
    if (acopayTradeCloseAcopayResponse.statusSuccessful()) {
      log.info("关单接口返回：{}", acopayTradeCloseAcopayResponse);
      // 获取业务数据
      AcopayTradeCloseResponseModel data = acopayTradeCloseAcopayResponse.getData();
      // 获取业务状态码
      String code = data.getCode();
      // 根据业务状态码进行商户业务处理

    } else {
      log.info("关单接口业务失败，返回状态码：{}， 返回信息：{}， 异常信息：{}",
        acopayTradeCloseAcopayResponse.getStatus(), acopayTradeCloseAcopayResponse.getMessage(),
        acopayTradeCloseAcopayResponse.getFieldErrors());
    }
  } catch (AcopayException e) {
    // 进行异常处理
    log.error("关单接口请求异常", e);
  }
}