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[程序员] 关于 MQTT 协议有几个问题想请教

发表于
问题 1:
我们物联网项目想使用 MQTT 作为通讯协议
方案 1: 使用阿里云 云消息队列 MQTT 版,Java 服务器接入消息队列
方案 2:Java 服务器自己实现 MQTT 协议
这两个方案你们怎么选择的?有哪些优劣? 有更好的方案吗?

问题 2:
目前市区内的 4G 物联网网络是否稳定?是否需要加上短信通知?

问题 3:
Java 有哪些好用的 MQTT 开源框架做应用开发,最好是开箱即用,和业务解耦,业务程序员最好不关心协议实现

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