二期 安装小程序

src/main/java/com/care/mqtt/service/MqttMsgInstallService.java

@@ -65,12 +65,13 @@ public class MqttMsgInstallService {
             logger.error("不是正确格式的消息");
             return;
         }
-        String ack = String.valueOf(msg.get("ack"));
-        if(StringUtils.isEmpty(ack)) {
+        Object ackObj = msg.get("ack");
+        if(ackObj == null) {
             logger.error("不是激活返回消息");
             return;
         }
 
+        String ack = String.valueOf(ackObj);
         logger.info("是激活返回消息: ack == " + ack);
 
         QueryWrapper<CareDevice> queryWrapper = new QueryWrapper<>();