有哪些 Java SSH 函式庫，以及如何使用 JSCH 進行安全遠端連線？

import com.jcraft.jsch.*;

public class SSHConnection {

    public static void main(String[] args) throws JSchException {
        // Replace user, host, and port with your own server details
        String user = "username";
        String host = "server.example.com";
        int port = 22;

        JSch jsch = new JSch();
        Session session = jsch.getSession(user, host, port);
        session.connect();

        Channel channel = session.openChannel("exec");
        ((ChannelExec) channel).setCommand("ls -la");
        channel.connect();

        InputStream in = channel.getInputStream();
        byte[] result = new byte[1024];
        while (true) {
            while (in.available() > 0) {
                int i = in.read(result, 0, 1024);
                if (i < 0) {
                    break;
                }
                System.out.print(new String(result, 0, i));
            }
            if (channel.isClosed()) {
                System.out.println("Exit status: " + channel.getExitStatus());
                break;
            }
        }

        channel.disconnect();
        session.disconnect();
    }
}