Netty(七) Netty5.x服务端+客户端代码

Netty5.x服务端+客户端代码

netty学习目录
一、Netty(一) NIO例子
二、Netty(二) netty服务端
三、Netty(三) Netty客户端+服务端
四、Netty(四) 简化版Netty源码
五、Netty(五)Netty5.x服务端
六、Netty(六) Netty Http 服务器例子
七、Netty(七) Netty服务端+客户端代码
八、Netty(八) Netty多客户端连接例子
九、Netty(九) Netty会话清除
十、Netty(十) Netty自定义编码器解码器

netty5.x 客户端与服务端代码,基本差不多，channel改为NioSocketChannel

服务端：

package com.zqw.netty5x;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.*;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.string.StringDecoder;
import io.netty.handler.codec.string.StringEncoder;

import java.net.InetSocketAddress;

public class Server {
    public static void main(String[] args) {
        ServerBootstrap bootstrap = new ServerBootstrap();
        EventLoopGroup boss = new NioEventLoopGroup();
        EventLoopGroup worker = new NioEventLoopGroup();
        try {
            bootstrap.group(boss, worker);
            bootstrap.channel(NioServerSocketChannel.class);
            bootstrap.childHandler(new ChannelInitializer<Channel>() {
                @Override
                protected void initChannel(Channel ch) throws Exception {
                    ch.pipeline().addLast(new StringEncoder());
                    ch.pipeline().addLast(new StringDecoder());
                    ch.pipeline().addLast(new ServerHandler());
                }
            });
            bootstrap.option(ChannelOption.SO_BACKLOG, 1024);
            bootstrap.childOption(ChannelOption.TCP_NODELAY, true);
            bootstrap.childOption(ChannelOption.SO_KEEPALIVE, true);
            ChannelFuture future = bootstrap.bind(new InetSocketAddress(7777));
            future.channel().closeFuture().sync();
            System.out.println("server start");
        } catch (InterruptedException e) {
            e.printStackTrace();
        }finally {
            boss.shutdownGracefully();
            worker.shutdownGracefully();
        }

    }
}

package com.zqw.netty5x;

import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelHandlerInvoker;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.util.concurrent.EventExecutorGroup;

public class ServerHandler extends SimpleChannelInboundHandler<String> {

    @Override
    protected void messageReceived(ChannelHandlerContext ctx, String msg) throws Exception {
        System.out.println(msg);
        ctx.writeAndFlush("给你个回话");

    }
}

客户端：

package com.zqw.netty5x;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.Channel;
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.nio.NioServerSocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.string.StringDecoder;
import io.netty.handler.codec.string.StringEncoder;

import java.util.Scanner;

public class Client {
    public static void main(String[] args) {
        Bootstrap bootstrap = new Bootstrap();
        EventLoopGroup worker = new NioEventLoopGroup();
        try{
            bootstrap.group(worker);
            bootstrap.channel(NioSocketChannel.class);
            bootstrap.handler(new ChannelInitializer<Channel>() {
                @Override
                protected void initChannel(Channel ch) throws Exception {
                    ch.pipeline().addLast(new StringEncoder());
                    ch.pipeline().addLast(new StringDecoder());
                    ch.pipeline().addLast(new ClientHandler());
                }
            });
            ChannelFuture futrue = bootstrap.connect("localhost", 7777);
            Scanner scanner = new Scanner(System.in);
            while(true){
                System.out.println("请输入:");
                futrue.channel().writeAndFlush(scanner.next());
            }
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            worker.shutdownGracefully();
        }
    }
}

package com.zqw.netty5x;

import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelHandlerInvoker;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.util.concurrent.EventExecutorGroup;

public class ClientHandler extends SimpleChannelInboundHandler<String> {
    @Override
    protected void messageReceived(ChannelHandlerContext ctx, String msg) throws Exception {
        System.out.println(msg);
    }
}