What are protocol buffers?
Protocol buffers are Google’s language-neutral, platform-neutral, extensible mechanism for serializing structured data – think XML, but smaller, faster, and simpler. You define how you want your data to be structured once, then you can use special generated source code to easily write and read your structured data to and from a variety of data streams and using a variety of languages. https://developers.google.cn/protocol-buffers
https://fuzhengwei.github.io/itstack-demo-netty-2/2019/08/17/netty%E6%A1%88%E4%BE%8B-netty4.1%E4%B8%AD%E7%BA%A7%E6%8B%93%E5%B1%95%E7%AF%87%E4%BA%8C-Netty%E4%BD%BF%E7%94%A8Protobuf%E4%BC%A0%E8%BE%93%E6%95%B0%E6%8D%AE.html
前言介绍
在netty数据传输过程中可以有很多选择，比如；字符串、json、xml、java对象，但为了保证传输的数据具备；良好的通用性、方便的操作性和传输的高性能，我们可以选择protobuf作为我们的数据传输格式。目前protobuf可以支持；C++、C#、Dart、Go、Java、Python等，也可以在JS里使用。知识点；ProtobufDecoder、ProtobufEncoder、ProtobufVarint32FrameDecoder、ProtobufVarint32LengthFieldPrepender。