import java.net.InetSocketAddress;
import java.util.Scanner;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import org.jboss.netty.bootstrap.ClientBootstrap;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelFuture;
import org.jboss.netty.channel.ChannelPipeline;
import org.jboss.netty.channel.ChannelPipelineFactory;
import org.jboss.netty.channel.Channels;
import org.jboss.netty.channel.socket.nio.NioClientSocketChannelFactory;
import org.jboss.netty.handler.codec.string.StringDecoder;
import org.jboss.netty.handler.codec.string.StringEncoder;

/**
 * netty客戶端入門
 */
public class Client {

	@SuppressWarnings("resource")
	public static void main(String[] args) {
		// 服務類
		ClientBootstrap bootstrap = new ClientBootstrap();
		// 執行緒池
		ExecutorService boss = Executors.newCachedThreadPool();
		ExecutorService worker = Executors.newCachedThreadPool();
		// socket工廠
		bootstrap.setFactory(new NioClientSocketChannelFactory(boss, worker));
		// 管道工廠
		bootstrap.setPipelineFactory(new ChannelPipelineFactory() {
			@Override
			public ChannelPipeline getPipeline() throws Exception {
				ChannelPipeline pipeline = Channels.pipeline();
				pipeline.addLast("decoder", new StringDecoder());
				pipeline.addLast("encoder", new StringEncoder());
				pipeline.addLast("hiHandler", new HiHandler());
				return pipeline;
			}
		});

		// 連線服務端
		ChannelFuture connect = bootstrap.connect(new InetSocketAddress(
				"127.0.0.1", 10101));
		Channel channel = connect.getChannel();
		System.out.println("client start");

		Scanner scanner = new Scanner(System.in);
		while (true) {
			System.out.println("請輸入");
			channel.write(scanner.next());
		}
	}

}


import org.jboss.netty.channel.ChannelHandlerContext;
import org.jboss.netty.channel.ChannelStateEvent;
import org.jboss.netty.channel.ExceptionEvent;
import org.jboss.netty.channel.MessageEvent;
import org.jboss.netty.channel.SimpleChannelHandler;

/**
 * 訊息接受處理類
 */
public class HiHandler extends SimpleChannelHandler {

	// 接收訊息
	@Override
	public void messageReceived(ChannelHandlerContext ctx, MessageEvent e)
			throws Exception {
		// 接收訊息
		String s = (String) e.getMessage();
		System.out.println(s);
		super.messageReceived(ctx, e);
	}

	// 捕獲異常
	@Override
	public void exceptionCaught(ChannelHandlerContext ctx, ExceptionEvent e)
			throws Exception {
		System.out.println("exceptionCaught");
		super.exceptionCaught(ctx, e);
	}

	// 新連線
	@Override
	public void channelConnected(ChannelHandlerContext ctx, ChannelStateEvent e)
			throws Exception {
		System.out.println("channelConnected");
		super.channelConnected(ctx, e);
	}

	// 必須【連線已經建立】，關閉通道的時候才會觸發
	@Override
	public void channelDisconnected(ChannelHandlerContext ctx,
			ChannelStateEvent e) throws Exception {
		System.out.println("channelDisconnected");
		super.channelDisconnected(ctx, e);
	}

	// channel關閉的時候觸發（比如服務端沒有啟動，客戶端發起連線的話，就會報這個錯）
	@Override
	public void channelClosed(ChannelHandlerContext ctx, ChannelStateEvent e)
			throws Exception {
		System.out.println("channelClosed");
		super.channelClosed(ctx, e);
	}
}