Netty学习教程之基础使用篇

import io.netty.bootstrap.ServerBootstrap; import io.netty.buffer.ByteBuf; import io.netty.buffer.Unpooled; import io.netty.channel.ChannelFuture; import io.netty.channel.ChannelInitializer; import io.netty.channel.ChannelOption; import io.netty.channel.EventLoopGroup; import io.netty.channel.nio.NioEventLoopGroup; import io.netty.channel.socket.SocketChannel; import io.netty.channel.socket.nio.NioServerSocketChannel; import io.netty.handler.codec.DelimiterBasedFrameDecoder; import io.netty.handler.codec.string.StringDecoder;  public class Server {    public static void main(String[] args) throws InterruptedException {   //1.第一个线程组是用于接收Client端连接的   EventLoopGroup bossGroup = new NioEventLoopGroup();   //2.第二个线程组是用于实际的业务处理的   EventLoopGroup workerGroup = new NioEventLoopGroup();   ServerBootstrap b = new ServerBootstrap();   b.group(bossGroup, workerGroup);//绑定两个线程池   b.channel(NioServerSocketChannel.class);//指定NIO的模式，如果是客户端就是NioSocketChannel   b.option(ChannelOption.SO_BACKLOG, 1024);//TCP的缓冲区设置   b.option(ChannelOption.SO_SNDBUF, 32*1024);//设置发送缓冲的大小   b.option(ChannelOption.SO_RCVBUF, 32*1024);//设置接收缓冲区大小   b.option(ChannelOption.SO_KEEPALIVE, true);//保持连续   b.childHandler(new ChannelInitializer<SocketChannel>() {    @Override    protected void initChannel(SocketChannel sc) throws Exception {     ByteBuf buf = Unpooled.copiedBuffer("$_".getBytes());//拆包粘包定义结束字符串（第一种解决方案）     sc.pipeline().addLast(new DelimiterBasedFrameDecoder(1024,buf));//在管道中加入结束字符串    // sc.pipeline().addLast(new FixedLengthFrameDecoder(200));第二种定长     sc.pipeline().addLast(new StringDecoder());//定义接收类型为字符串把ByteBuf转成String     sc.pipeline().addLast(new ServertHandler());//在这里配置具体数据接收方法的处理    }   });   ChannelFuture future = b.bind(8765).sync();//绑定端口   future.channel().closeFuture().sync();//等待关闭(程序阻塞在这里等待客户端请求)   bossGroup.shutdownGracefully();//关闭线程   workerGroup.shutdownGracefully();//关闭线程  } }