netty环境配置

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本文介绍了如何使用Intellij IDEA和Maven搭建Netty的开发环境。通过配置pom.xml文件，能够理解并探索Netty的源代码。完成配置后，访问127.0.0.1:8000将在控制台输出'Hello world, I'm server.'。" 131767509,9231758,Java运算符详解：Lambda与算术运算符,"['JavaSE系列教程', '运算符及其分类', 'Lambda运算符', '算术运算符']

Netty框架用到了java里nio的特性，可以用来建立高性能服务器，为了了解netty的源代码，使用Intellij+maven搭建netty开发环境。

1.maven中pom.xml配置

<dependency>
    <groupId>io.netty</groupId>
    <artifactId>netty-all</artifactId>
    <version>4.0.26.Final</version>
</dependency>

2.java代码

package com.gyq.netty;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.*;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;

/**
 * Created by andrewgyq on 2015/3/22.
 */
public class NettyTest {
    public static void main(String[] args) {
        // EventLoop 代替原来的 ChannelFactory
        EventLoopGroup bossGroup = new NioEventLoopGroup();
        EventLoopGroup workerGroup = new NioEventLoopGroup();
        try {
            ServerBootstrap serverBootstrap = new ServerBootstrap();
            // server端采用简洁的连写方式，client端才用分段普通写法。
            serverBootstrap.group(bossGroup, workerGroup)
                    .channel(NioServerSocketChannel.class )
                    .childHandler( new ChannelInitializer<SocketChannel>() {
                        @Override
                        public void initChannel(SocketChannel ch)
                                throws Exception {
                            ch.pipeline().addLast( new HelloServerHandler());
                        }
                    }).option(ChannelOption. SO_KEEPALIVE , true );

            ChannelFuture f = serverBootstrap.bind(8000).sync();
            f.channel().closeFuture().sync();
        } catch (InterruptedException e) {
        } finally {
            workerGroup.shutdownGracefully();
            bossGroup.shutdownGracefully();
        }
    }

    private static class HelloServerHandler extends ChannelInboundHandlerAdapter {

        @Override
        public void channelActive(ChannelHandlerContext ctx) throws Exception {
            System. out .println("Hello world, I'm server.");
        }
    }
}

3.测试

打开浏览器，输入127.0.0.1:8000，回车后会看到控制台打印出Hello world, I'm server.