1.完善注释

src/main/java/com/corundumstudio/socketio/demo/SimpleServer.java

@@ -14,7 +14,19 @@ import io.netty.channel.socket.nio.NioServerSocketChannel;
  * @copyright Wonhigh Information Technology (Shenzhen) Co.,Ltd.
  */
 public class SimpleServer {
-
+    /**
+     * netty核心组件
+     *
+     * channel
+     * channelConfig
+     * channelId
+     * Unsafe
+     * Pipeline
+     * ChannelHander
+     *
+     * @param args
+     * @throws Exception
+     */
     public static void main(String[] args) throws Exception {
         EventLoopGroup bossGroup = new NioEventLoopGroup(1);
         EventLoopGroup workerGroup = new NioEventLoopGroup();
@@ -25,7 +37,14 @@ public class SimpleServer {
              * 通过给它设置一系列参数来绑定端口启动服务
              */
             ServerBootstrap b = new ServerBootstrap();
+            /**
+             * bossGroup负责接收请求
+             * workerGroup负责处理请求
+             */
             b.group(bossGroup, workerGroup)
+                    //最终调用的是ReflectiveChannelFactory.newChannel()
+                    //通过反射创建对象 NioServerSocketChannel
+                    //最终创建channel相当于调用默认构造函数new出一个NioServerSocketChannel对象
                     .channel(NioServerSocketChannel.class)
                     .handler(new SimpleServerHandler())
                     .childHandler(new ChannelInitializer<SocketChannel>() {
@@ -34,6 +53,10 @@ public class SimpleServer {
                         }
                     });
 
+            /**
+             * bind方法第一步通过反射new一个NioServerSocketChannel对象,并且在
+             * new的过程中创建一系列核心组件
+             */
             ChannelFuture f = b.bind(8888).sync();
 
             f.channel().closeFuture().sync();