//服务类

ServerBootstrap bootstrap = new ServerBootstrap();

//Boss  Work

NioEventLoopGroup boss = new NioEventLoopGroup();

NioEventLoopGroup work = new NioEventLoopGroup();

try {

//设置线程

bootstrap.group(boss, work);

//设置socket工厂

bootstrap.channel(NioServerSocketChannel.class);

//设置pipe工厂

bootstrap.childHandler(new ChannelInitializer<Channel>() {

protected void initChannel(Channel ch) throws Exception {

ch.pipeline().addLast(new StringDecoder());

ch.pipeline().addLast(new StringEncoder());

ch.pipeline().addLast(new ServerHandler());

};

});

//设置参数

bootstrap.option(ChannelOption.SO_BACKLOG, 2048);//serverSocketChannel的设置 连接缓冲池 最大等待连接数 2048

//SocketChannel设置

bootstrap.childOption(ChannelOption.SO_KEEPALIVE, true);//自动关闭连接 维持链接活跃 清除死链接

bootstrap.childOption(ChannelOption.TCP_NODELAY, true);

ChannelFuture future = bootstrap.bind(new InetSocketAddress(7000));

System.out.println("start");

//等待channel关闭 

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

System.out.println("sync");

} catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}finally{

System.out.println("finally");

//释放资源

boss.shutdownGracefully();

work.shutdownGracefully();

}

}