说明：  大华平台SDK开发手册(java版),本文主要介绍了平台SDK接口参考说明以及使用案例。主要包含编程引导、组织设备信息、实时与云台控制、回放与下载、语音对讲、电视墙、事件、窗口、错误码参考等信息。
(Dahua Platform SDK development manual (Java version), this paper mainly introduces the Platform SDK interface reference instructions and use cases. It mainly includes programming guidance, organizing equipment information, real-time and PTZ control, playback and download, voice intercom, TV wall, event, window, error code reference and other information.)