import io.netty.bootstrap.ServerBootstrap;
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.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
public class NettyServer {
private int port;
public NettyServer(int port) {
this.port = port;
}
public void start() throws Exception {
EventLoopGroup bossGroup = new NioEventLoopGroup();
EventLoopGroup workerGroup = new NioEventLoopGroup();
try {
ServerBootstrap b = new ServerBootstrap();
b.group(bossGroup, workerGroup)
.channel(NioServerSocketChannel.class)
.childHandler(new ChannelInitializer<SocketChannel>() {
@Override
public void initChannel(SocketChannel ch) throws Exception {
// 添加自定义的处理器(Handler)
}
});
ChannelFuture f = b.bind(port).sync();
System.out.println("服务器启动，监听端口：" + port);
f.channel().closeFuture().sync();
} finally {
workerGroup.shutdownGracefully();
bossGroup.shutdownGracefully();
}
}
public static void main(String[] args) throws Exception {
int port;
if (args.length > 0) {
port = Integer.parseInt(args[0]);
} else {
port = 8080;
}
new NettyServer(port).start();
}
}这段代码展示了如何使用Netty框架创建一个简单的服务器。它设置了两个EventLoopGroup，一个用于接受连接，一个用于处理I/O操作。然后，它配置了ServerBootstrap，绑定了端口，并启动了服务器。代码中的注释解释了每一步的作用。这个例子是Netty服务器的基础，开发者可以在其中添加自定义的处理器来处理网络请求。