Java中的安全TCP连接

import javax.net.ssl.*;
import java.io.*;

public class SecureTCPClient {
    public static void main(String[] args) {
        String host = "example.com";
        int port = 443;

        try {
            // 创建SSL上下文
            SSLContext context = SSLContext.getInstance("TLS");
            context.init(null, null, null);

            // 创建SSL套接字工厂
            SSLSocketFactory factory = context.getSocketFactory();

            // 创建SSL套接字
            SSLSocket socket = (SSLSocket) factory.createSocket(host, port);

            // 启动SSL握手过程
            socket.startHandshake();

            // 创建输入流和输出流
            PrintWriter output = new PrintWriter(socket.getOutputStream(), true);
            BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream()));

            // 发送和接收数据
            output.println("Hello, world!");
            System.out.println("Server response: " + input.readLine());

            // 关闭套接字和流
            socket.close();
            output.close();
            input.close();
        } catch (IOException | NoSuchAlgorithmException | KeyManagementException e) {
            e.printStackTrace();
        }
    }
}