java远程连接堡垒机

import com.jcraft.jsch.*;

public class SSHConnectionExample {
    public static void main(String[] args) {
        String host = "your_bastion_host";
        int port = 22;
        String user = "your_username";
        String password = "your_password";

        try {
            JSch jsch = new JSch();
            Session session = jsch.getSession(user, host, port);
            session.setPassword(password);
            session.setConfig("StrictHostKeyChecking", "no");
            session.connect();

            System.out.println("Connected to bastion host");

            // 连接到目标系统
            ChannelExec channelExec = (ChannelExec) session.openChannel("exec");
            channelExec.setCommand("ssh your_target_host");
            channelExec.setInputStream(null);
            ((ChannelInputStream) channelExec.getInputStream()).setErrStream(System.err);

            InputStream in = channelExec.getInputStream();
            channelExec.connect();

            byte[] tmp = new byte[1024];
            while (true) {
                while (in.available() > 0) {
                    int i = in.read(tmp, 0, 1024);
                    if (i < 0) break;
                    System.out.print(new String(tmp, 0, i));
                }
                if (channelExec.isClosed()) {
                    if (in.available() > 0) continue;
                    System.out.println("Exit status: " + channelExec.getExitStatus());
                    break;
                }
                try { Thread.sleep(1000); } catch (Exception ee) {}
            }

            channelExec.disconnect();
            session.disconnect();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}