netty之NettyServer接收数据

前言

对于一个初学者，不建议上来就研究理论，实操往往更重要。本章节介绍使用netty端写一个能接收数据的socketServer服务端，通过实现通道适配器ChannelInboundHandlerAdapter.channelRead获取并并解析接收数据

一：MyChannelInitializer

java 复制代码

public class MyChannelInitializer extends ChannelInitializer<SocketChannel> {

    @Override
    protected void initChannel(SocketChannel channel) {

        System.out.println("链接报告开始");
        System.out.println("链接报告信息：有一客户端链接到本服务端");
        System.out.println("链接报告IP:" + channel.localAddress().getHostString());
        System.out.println("链接报告Port:" + channel.localAddress().getPort());
        System.out.println("链接报告完毕");

        //在管道中添加我们自己的接收数据实现方法
        channel.pipeline().addLast(new MyServerHandler());

    }

MyServerHandler

java 复制代码

public class MyServerHandler extends ChannelInboundHandlerAdapter {

    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        //接收msg消息
        ByteBuf buf = (ByteBuf) msg;
        byte[] msgByte = new byte[buf.readableBytes()];
        buf.readBytes(msgByte);
        System.out.print(new Date() + "接收到消息：");
        System.out.println(new String(msgByte, Charset.forName("GBK")));
    }
}

java 复制代码

public class NettyServer {
    public static void main(String[] args) {
        new NettyServer().bing(7397);
    }

    private void bing(int port) {
        //配置服务端NIO线程组
        //NioEventLoopGroup extends MultithreadEventLoopGroup Math.max(1, SystemPropertyUtil.getInt("io.netty.eventLoopThreads", NettyRuntime.availableProcessors() * 2));
        EventLoopGroup parentGroup = new NioEventLoopGroup();
        EventLoopGroup childGroup = new NioEventLoopGroup();
        try {
            ServerBootstrap b = new ServerBootstrap();
            b.group(parentGroup, childGroup)
                    .channel(NioServerSocketChannel.class)    //非阻塞模式
                    .option(ChannelOption.SO_BACKLOG, 128)
                    .childHandler(new MyChannelInitializer());
            ChannelFuture f = b.bind(port).sync();
            System.out.println("com.lm.netty03 server start done. {关注码农明哥：获取源码}");
            f.channel().closeFuture().sync();
        } catch (InterruptedException e) {
            e.printStackTrace();
        } finally {
            childGroup.shutdownGracefully();
            parentGroup.shutdownGracefully();
        }

    }
}

启动

NettyServer

好了到这里就结束了基础netty之NettyServer接收数据的学习，大家一定要跟着动手操作起来。需要的源码的可si我获取；