고성능 네트워크 애플리케이션을 구현하기 위해 Java에서 네트워크 프로그래밍 프레임워크를 사용하는 방법은 무엇입니까?

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.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class NIOServer {
    private static final int PORT = 8888;
    private static final int BUFFER_SIZE = 1024;

    public static void main(String[] args) {
        try {
            ServerSocketChannel serverSocketChannel = ServerSocketChannel.open();
            serverSocketChannel.bind(new InetSocketAddress(PORT));
            serverSocketChannel.configureBlocking(false);

            ExecutorService executorService = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());

            while (true) {
                SocketChannel socketChannel = serverSocketChannel.accept();
                if (socketChannel != null) {
                    executorService.submit(() -> {
                        ByteBuffer buffer = ByteBuffer.allocate(BUFFER_SIZE);
                        try {
                            socketChannel.read(buffer);
                            buffer.flip();
                            socketChannel.write(buffer);
                            buffer.clear();
                            socketChannel.close();
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                    });
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
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 static final int PORT = 8888;

    public static void main(String[] args) throws Exception {
        EventLoopGroup bossGroup = new NioEventLoopGroup();
        EventLoopGroup workerGroup = new NioEventLoopGroup();

        try {
            ServerBootstrap serverBootstrap = new ServerBootstrap();
            serverBootstrap.group(bossGroup, workerGroup)
                    .channel(NioServerSocketChannel.class)
                    .childHandler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        protected void initChannel(SocketChannel ch) {
                            ch.pipeline().addLast(new SimpleServerHandler());
                        }
                    })
                    .option(ChannelOption.SO_BACKLOG, 128)
                    .childOption(ChannelOption.SO_KEEPALIVE, true);

            serverBootstrap.bind(PORT).sync().channel().closeFuture().sync();
        } finally {
            workerGroup.shutdownGracefully();
            bossGroup.shutdownGracefully();
        }
    }
}

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@SpringBootApplication
public class SpringBootApp {
    public static void main(String[] args) {
        SpringApplication.run(SpringBootApp.class, args);
    }
}

@RestController
class HelloWorldController {
    @GetMapping("/hello")
    public String hello() {
        return "Hello, World!";
    }
}