@Async
public void create() {
    //TODO
}

public void build() {
    executor.execute(() -> build());
}

byte [] data = new byte[1024];
InputStream in = socket.getInputStream();
in.read(data);
// 接收到数据，异步处理
executor.execute(() -> handle(data));

public void handle(byte [] data) {
    // TODO
}

selector.select();
Set<SelectionKey> keys = selector.selectedKeys();
Iterator<SelectionKey> iterator = keys.iterator();
while (iterator.hasNext()) {
    SelectionKey key = iterator.next();
    if (key.isReadable()) {
        SocketChannel channel = (SocketChannel) key.channel();
        ByteBuffer byteBuffer = (ByteBuffer) key.attachment();
        executor.execute(() -> {
            try {
                channel.read(byteBuffer);
                handle(byteBuffer);
            } catch (Exception e) {

            }
        });
    }
}

public static void handle(ByteBuffer buffer) {
    // TODO
}

public class AioServer {

    public static void main(String[] args) throws IOException {
        System.out.println(Thread.currentThread().getName() + " AioServer start");
        AsynchronousServerSocketChannel serverChannel = AsynchronousServerSocketChannel.open()
                .bind(new InetSocketAddress("127.0.0.1", 8080));
        serverChannel.accept(null, new CompletionHandler<AsynchronousSocketChannel, Void>() {

            @Override
            public void completed(AsynchronousSocketChannel clientChannel, Void attachment) {
                System.out.println(Thread.currentThread().getName() + " client is connected");
                ByteBuffer buffer = ByteBuffer.allocate(1024);
                clientChannel.read(buffer, buffer, new ClientHandler());
            }

            @Override
            public void failed(Throwable exc, Void attachment) {
                System.out.println("accept fail");
            }
        });
        System.in.read();
    }
}

public class ClientHandler implements CompletionHandler<Integer, ByteBuffer> {
    @Override
    public void completed(Integer result, ByteBuffer buffer) {
        buffer.flip();
        byte [] data = new byte[buffer.remaining()];
        buffer.get(data);
        System.out.println(Thread.currentThread().getName() + " received:"  + new String(data, StandardCharsets.UTF_8));
    }

    @Override
    public void failed(Throwable exc, ByteBuffer buffer) {

    }
}

public class AioClient {
    public static void main(String[] args) throws Exception {
        AsynchronousSocketChannel channel = AsynchronousSocketChannel.open();
        channel.connect(new InetSocketAddress("127.0.0.1", 8080));
        ByteBuffer buffer = ByteBuffer.allocate(1024);
        buffer.put("Java AIO".getBytes(StandardCharsets.UTF_8));
        buffer.flip();
        Thread.sleep(1000L);
        channel.write(buffer);
 }
}