code: @Override
      public boolean sendText(String toUserName, String msg) {
          DateUtils.sendSleep();
          String url   = String.format("%s/webwxsendmsg?pass_ticket=%s", bot.session().getUrl(), bot.session().getPassTicket());
          String msgId = System.currentTimeMillis() / 1000 + StringUtils.random(6);
  
          JsonResponse response = this.client.send(new JsonRequest(url).post().jsonBody()
                  .add("BaseRequest", bot.session().getBaseRequest())
                  .add("Msg", new SendMessage(1, msg, bot.session().getUserName(), toUserName, msgId, msgId))
          );
          return null != response && response.success();
      }
docs: 发送文本消息
  
  @param msg        文本消息
  @param toUserName 发送给谁