Java のネットワーク セキュリティ プロトコルを使用してネットワーク通信のセキュリティを保護するにはどうすればよいですか?

import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLServerSocket;
import javax.net.ssl.SSLSocket;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

public class SecureServer {

    public static void main(String[] args) {
        try {
            // 创建SSLContext对象，指定使用TLS协议
            SSLContext sslContext = SSLContext.getInstance("TLS");

            // 初始化SSLContext对象，指定服务器的证书和私钥
            sslContext.init(null, null, null);

            // 创建SSLServerSocket对象，指定使用SSLContext
            SSLServerSocket serverSocket = (SSLServerSocket) sslContext.getServerSocketFactory().createServerSocket(8888);

            while (true) {
                // 等待客户端连接
                SSLSocket clientSocket = (SSLSocket) serverSocket.accept();

                // 获取输入输出流
                InputStream inputStream = clientSocket.getInputStream();
                OutputStream outputStream = clientSocket.getOutputStream();

                // 进行数据的读写操作
                // ...

                // 关闭连接
                clientSocket.close();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocket;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

public class SecureClient {

    public static void main(String[] args) {
        try {
            // 创建SSLContext对象，指定使用TLS协议
            SSLContext sslContext = SSLContext.getInstance("TLS");

            // 初始化SSLContext对象
            sslContext.init(null, null, null);

            // 创建SSLSocket对象，指定服务器地址和端口号
            SSLSocket socket = (SSLSocket) sslContext.getSocketFactory().createSocket("localhost", 8888);

            // 获取输入输出流
            InputStream inputStream = socket.getInputStream();
            OutputStream outputStream = socket.getOutputStream();

            // 进行数据的读写操作
            // ...

            // 关闭连接
            socket.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URL;
import javax.net.ssl.HttpsURLConnection;

public class SecureHttp {

    public static void main(String[] args) {
        try {
            // 创建URL对象，指定HTTPS地址
            URL url = new URL("https://www.example.com");

            // 打开连接
            HttpsURLConnection connection = (HttpsURLConnection) url.openConnection();

            // 获取输入流
            BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));

            // 读取响应
            String line;
            StringBuilder response = new StringBuilder();
            while ((line = reader.readLine()) != null) {
                response.append(line);
            }
            reader.close();

            // 输出响应
            System.out.println(response.toString());

            // 关闭连接
            connection.disconnect();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}