TankNettyStudy/src/main/java/com/msb/socket/Client.java

package com.msb.socket;/**
 * @Author bingor
 * @Date 2022/11/16 13:39
 * @Description: com.msb.socket
 * @Version: 1.0
 */

import io.netty.bootstrap.Bootstrap;
import io.netty.buffer.ByteBuf;
import io.netty.channel.*;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;

/**
 *@ClassName Client
 *@Description TODO
 *@Author bingor
 *@Date 2022/11/16 13:39
 *@Version 3.0
 */
public class Client {

    public void connect() {
        //线程池
        EventLoopGroup group = new NioEventLoopGroup(1);
        Bootstrap bootstrap = new Bootstrap();

        try {
            ChannelFuture future = bootstrap.group(group)
                    .channel(NioSocketChannel.class)
                    .handler(new ClientChannelInitializer())
                    .connect("localhost", 8888);

            future.addListener(new ChannelFutureListener() {
                @Override
                public void operationComplete(ChannelFuture channelFuture) throws Exception {
                    if(channelFuture.isSuccess()) {
                        System.out.println("connected!");
                    } else {
                        System.out.println("not connect!");
                    }
                }
            });

            future.sync();

            future.channel().closeFuture().sync();

        } catch (InterruptedException e) {
            e.printStackTrace();
        } finally {
            group.shutdownGracefully();
        }
    }

    public static void main(String[] args) {
        Client client = new Client();
        client.connect();
    }

}

class ClientChannelInitializer extends ChannelInitializer<SocketChannel> {
    @Override
    protected void initChannel(SocketChannel socketChannel) throws Exception {
        socketChannel.pipeline().addLast(new ClientHandler());
    }
}

class ClientHandler extends ChannelInboundHandlerAdapter {

    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
//        super.channelRead(ctx, msg);
        ByteBuf buf = (ByteBuf) msg;
        byte[] bytes = new byte[buf.readableBytes()];
        buf.getBytes(buf.readerIndex(), bytes);
        System.out.println(new String(bytes));
    }
}