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1.什么是Netty
The Netty project is an effort to provide an asynchronous event-driven network application framework and tooling for the rapid development of maintainable high-performance · high-scalability protocol servers and clients.
In other words, Netty is an NIO client server framework that enables quick and easy development of network applications such as protocol servers and clients. It greatly simplifies and streamlines network programming such as TCP and UDP socket server development.
2.Getting started
If you prefer top-down approach in learning something, you might want to start from Chapter 2, Architectural Overview and get back here.
一个top-down approach的方法：先看Architectural架构图，再实践。