Server

package com.netty;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 Exception {//1.第一個線程是用于接收client連接的EventLoopGroup bossGroup = new NioEventLoopGroup();//2.第二個線程是用于實際的業務處理操作的EventLoopGroup workGroup = new NioEventLoopGroup();ServerBootstrap b = new ServerBootstrap();b.group(bossGroup, workGroup).channel(NioServerSocketChannel.class).childHandler(new ChannelInitializer<SocketChannel>() {@Overrideprotected void initChannel(SocketChannel sc) throws Exception {ByteBuf buf = Unpooled.copiedBuffer("$_".getBytes());sc.pipeline().addLast(new DelimiterBasedFrameDecoder(1024, buf));   //分隔符sc.pipeline().addLast(new StringDecoder());//發送string類型sc.pipeline().addLast(new ServerHandler());}}).option(ChannelOption.SO_KEEPALIVE, true);ChannelFuture f = b.bind(1234).sync();f.channel().closeFuture().sync();bossGroup.shutdownGracefully();workGroup.shutdownGracefully();}
}

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ServerHandler

package com.netty;import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerAdapter;
import io.netty.channel.ChannelHandlerContext;
import io.netty.util.ReferenceCountUtil;public class ServerHandler extends ChannelHandlerAdapter {@Overridepublic void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {try {/*ByteBuf buf = (ByteBuf) msg;byte[] data = new byte[buf.readableBytes()];buf.readBytes(data);String request = new String(data,"utf-8");System.out.println(request);*/System.out.println("--------->"+msg);String response = "Hi Client";ctx.writeAndFlush(Unpooled.copiedBuffer(response.getBytes()));} finally {ReferenceCountUtil.release(msg);}}@Overridepublic void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {// TODO Auto-generated method stubsuper.exceptionCaught(ctx, cause);}
}

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Client

package com.netty;import io.netty.bootstrap.Bootstrap;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;public class Client {public static void main(String[] args) throws Exception {EventLoopGroup group = new NioEventLoopGroup();Bootstrap b = new Bootstrap();b.group(group).channel(NioSocketChannel.class).handler(new ChannelInitializer<SocketChannel>() {@Overrideprotected void initChannel(SocketChannel sc) throws Exception {sc.pipeline().addLast(new ClientHandler());}});ChannelFuture f = b.connect("127.0.0.1", 1234).sync();f.channel().write(Unpooled.copiedBuffer("hello word$_".getBytes()));f.channel().write(Unpooled.copiedBuffer("hello word$_".getBytes()));f.channel().write(Unpooled.copiedBuffer("hello word$_".getBytes()));f.channel().flush();f.channel().closeFuture().sync();group.shutdownGracefully();}
}

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ClientHandler

package com.netty;import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerAdapter;
import io.netty.channel.ChannelHandlerContext;public class ClientHandler extends ChannelHandlerAdapter {@Overridepublic void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {ByteBuf buf = (ByteBuf) msg;byte[] data = new byte[buf.readableBytes()];buf.readBytes(data);String request = new String(data,"utf-8");System.out.println(request);}@Overridepublic void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {// TODO Auto-generated method stubsuper.exceptionCaught(ctx, cause);}
}

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