侦听多个套接字(InputStreamReader)

Selector selector = Selector.open();
ServerSocketChannel serverChannel = ServerSocketChannel.open();
serverChannel.configureBlocking(false);
ServerSocket serverSocket = serverChannel.socket();
InetSocketAddress address = new InetSocketAddress("localhost", 8080);
serverSocket.bind(address);
serverChannel.register(selector, SelectionKey.OP_ACCEPT);
while (true) {
    selector.select();
    Set<SelectionKey> selectedKeys = selector.selectedKeys();
    Iterator<SelectionKey> keyIterator = selectedKeys.iterator();
    while (keyIterator.hasNext()) {
        SelectionKey key = keyIterator.next();
        if (key.isAcceptable()) {
            ServerSocketChannel serverChannel = (ServerSocketChannel) key.channel();
            SocketChannel clientChannel = serverChannel.accept();
            clientChannel.configureBlocking(false);
            clientChannel.register(selector, SelectionKey.OP_READ);
        } else if (key.isReadable()) {
            SocketChannel clientChannel = (SocketChannel) key.channel();
            ByteBuffer buffer = ByteBuffer.allocate(1024);
            int bytesRead = clientChannel.read(buffer);
            if (bytesRead == -1) {
                clientChannel.close();
                key.cancel();
            } else {
                buffer.flip();
                byte[] bytes = new byte[bytesRead];
                buffer.get(bytes);
                String message = new String(bytes, StandardCharsets.UTF_8);
                System.out.println("Received message: " + message);
            }
        }
        keyIterator.remove();
    }
}