Java 函数中 NIO 技术如何在微服务架构中发挥作用？

import java.io.IOException;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.ServerSocketChannel;
import java.nio.channels.SocketChannel;
import java.util.HashMap;
import java.util.Map;

public class NioWebServer {

    public static void main(String[] args) throws IOException {
        // 创建服务器通道
        ServerSocketChannel serverSocketChannel = ServerSocketChannel.open();
        // 设置非阻塞
        serverSocketChannel.configureBlocking(false);
        // 绑定端口
        serverSocketChannel.bind(new InetSocketAddress(8080));

        // 事件循环
        while (true) {
            // 接受连接
            SocketChannel socketChannel = serverSocketChannel.accept();
            if (socketChannel == null) {
                // 没有连接，继续循环
                continue;
            }
            // 设置非阻塞
            socketChannel.configureBlocking(false);

            // 异步读取请求
            ByteBuffer buffer = ByteBuffer.allocate(1024);
            socketChannel.read(buffer, new CompletionHandler<Integer, SocketChannel>() {
                @Override
                public void completed(Integer result, SocketChannel attachment) {
                    // 处理请求
                    handleHttpRequest(buffer);
                }

                @Override
                public void failed(Throwable exc, SocketChannel attachment) {
                    // 处理错误
                }
            });
        }
    }

    private static void handleHttpRequest(ByteBuffer buffer) {
        // 解析请求
        String[] request = new String(buffer.array()).split(" ");
        String method = request[0];
        String path = request[1];

        // 构建响应
        Map<String, String> response = new HashMap<>();
        response.put("Content-Type", "text/html");
        response.put("Body", "<h1>Hello from NIO Web Server</h1>");

        // 异步写入响应
        SocketChannel socketChannel = (SocketChannel) buffer.attachment();
        ByteBuffer responseBuffer = ByteBuffer.wrap(response.toString().getBytes());
        socketChannel.write(responseBuffer, new CompletionHandler<Integer, SocketChannel>() {
            @Override
            public void completed(Integer result, SocketChannel attachment) {
                // 关闭连接
                socketChannel.close();
            }

            @Override
            public void failed(Throwable exc, SocketChannel attachment) {
                // 处理错误
            }
        });
    }
}