@PostMapping("/refunds/notify")
public String refundsNotify(HttpServletRequest request, HttpServletResponse response){
  // 成功验签
  // 处理业务逻辑
  // 成功应答
  response.setStatus(200);
  map.put("code", "SUCCESS");
  map.put("message", "成功");
  System.out.println("返回给微信的：" + gson.toJson(map));
  return gson.toJson(map);
}

控制台也打印出返回给微信的：{"code":"SUCCESS","message":"成功"}
但是为什么还是重复收到微信发过来的回调通知？
{"mchid":"1558950191","out_trade_no":"ORDER_20221123215216573","transaction_id":"4200001647202211239756458359","out_refund_no":"REFUND_20221123215248108","refund_id":"50301403952022112327558288433","refund_status":"SUCCESS","success_time":"2022-11-23T21:53:46+08:00","amount":{"total":1,"refund":1,"payer_total":1,"payer_refund":1},"user_received_account":"支付用户零钱"}