最通用TCP黏包解决方案:LengthFieldBasedFrameDecoder和LengthFieldPrepender
https://blog.csdn.net/u010853261/article/details/55803933
【看完就会】Netty的LengthFieldBasedFrameDecoder的用法详解
https://blog.csdn.net/zougen/article/details/79037675
https://blog.csdn.net/u010853261/article/details/55803933
https://blog.csdn.net/zougen/article/details/79037675