让Netty入门变得简单

让Netty入门变得简单

https://mp.weixin.qq.com/s/MBnbLmCmFJo0QK9WNwXrXQ

如果先启动nettyClient就不会有nettyServer输出了；

package com.stono;

import java.io.IOException;
import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;

public class IOServer {

    public static void main(String[] args) throws IOException {
        ServerSocket serverSocket = new ServerSocket(8000);
        new Thread(() -> {
            while (true) {
                try{
                    Socket socket = serverSocket.accept();
                    new Thread(() -> {
                        try{
                            byte[] data = new byte[1024];
                            InputStream inputStream = socket.getInputStream();
                            while (true) {
                                int len;
                                while ((len = inputStream.read(data)) != -1) {
                                    System.out.println(new String(data, 0, len));
                                }
                            }
                        }catch (Exception e){

                        }
                    }).start();
                }catch (Exception e){
                }
            }
        }).start();
    }
}

package com.stono;

import java.net.Socket;
import java.util.Date;

public class IOClient {
    public static void main(String[] args) {
        new Thread(() -> {
            try {
                Socket socket = new Socket("127.0.0.1", 8000);
                while (true) {
                    try {
                        socket.getOutputStream().write((new Date() + ": hello world").getBytes());
                        socket.getOutputStream().flush();
                        Thread.sleep(2000);
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }).start();

    }
}

package com.stono;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.string.StringDecoder;

public class NettyServer {

    public static void main(String[] args) {
        ServerBootstrap serverBootstrap = new ServerBootstrap();
        NioEventLoopGroup boos = new NioEventLoopGroup();
        NioEventLoopGroup worker = new NioEventLoopGroup();
        serverBootstrap
                .group(boos, worker)
                .channel(NioServerSocketChannel.class)
                .childHandler(new ChannelInitializer<NioSocketChannel>() {

                    @Override
                    protected void initChannel(NioSocketChannel ch) throws Exception {
                        ch.pipeline().addLast(new StringDecoder());
                        ch.pipeline().addLast(new SimpleChannelInboundHandler<String>() {
                            @Override
                            protected void channelRead0(ChannelHandlerContext channelHandlerContext, String s) throws Exception {
                                System.out.println(s);
                            }
                        });

                    }
                })
                .bind(8000);
    }
}

package com.stono;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.string.StringEncoder;

import java.util.Date;
import java.util.concurrent.TimeUnit;

public class NettyClient {
    public static void main(String[] args) throws InterruptedException {
        Bootstrap bootstrap = new Bootstrap();
        NioEventLoopGroup group = new NioEventLoopGroup();
        bootstrap.group(group)
                .channel(NioSocketChannel.class)
                .handler(new ChannelInitializer<Channel>() {
                    @Override
                    protected void initChannel(Channel channel) throws Exception {
                        channel.pipeline().addLast(new StringEncoder());
                    }
                });

        Channel channel = bootstrap.connect("127.0.0.1", 8000).channel();
        while (true) {
            channel.writeAndFlush(new Date() + ": hello world");
            TimeUnit.SECONDS.sleep(2);
        }

    }
}