如何使用 Java 函数中 NIO 技术优化数据处理？

public class NioServer {

    public static void main(String[] args) throws IOException {
        // 创建 NIO 通道
        NioServerSocketChannel serverSocket = NioServerSocketChannel.open();

        // 配置非阻塞模式
        ServerSocketChannel.configureBlocking(false);

        // 绑定到端口
        serverSocket.bind(new InetSocketAddress(8080));

        // 创建选择器
        Selector selector = Selector.open();

        // 将服务器端点注册到选择器
        serverSocket.register(selector, SelectionKey.OP_ACCEPT);

        while (true) {
            // 选择就绪的通道
            selector.select();

            // 处理就绪的通道
            Iterator<SelectionKey> keys = selector.selectedKeys().iterator();
            while (keys.hasNext()) {
                SelectionKey key = keys.next();
                keys.remove();

                if (key.isAcceptable()) {
                    // 处理新连接
                    NioSocketChannel clientSocket = serverSocket.accept();
                    clientSocket.register(selector, SelectionKey.OP_READ);
                } else if (key.isReadable()) {
                    // 读取数据
                    NioSocketChannel clientSocket = (NioSocketChannel) key.channel();
                    ByteBuffer buffer = ByteBuffer.allocate(1024);
                    int bytesRead = clientSocket.read(buffer);

                    if (bytesRead > 0) {
                        // 回显数据
                        buffer.flip();
                        clientSocket.write(buffer);
                    } else if (bytesRead == -1) {
                        // 客户端已关闭连接
                        key.cancel();
                        clientSocket.close();
                    }
                }
            }
        }
    }
}