Spring Jsch java ssh 접속

private Session session;
private ChannelExec channelExec;

connect

public void connectSSH() throws JSchException {
  JSch jsch = new JSch();
  session = jsch.getSession(username, host, port);
  session.setPassword(password);
  session.setConfig("StrictHostKeyChecking", "no");

  session.connect();
}

connectSSH(); // ssh 연결

try {
    Channel channel = session.openChannel("exec");  // 채널 접속

    channelExec = (ChannelExec) channel; // 명령 전송 채널사용
    channelExec.setPty(true);
    channelExec.setCommand(command);

    InputStream in = channel.getInputStream();
    ((ChannelExec) channel).setErrStream(System.err);
    StreamGobbler streamGobbler = new StreamGobbler(in, messageService::send); // 웹소켓  
    Executors.newSingleThreadExecutor().submit(streamGobbler);

    channel.connect();  // 실행

    while (true) {
        if(channel.isClosed()) {
            channel.disconnect();
            break;
        }
    }

} catch (JSchException e) {
    throw new RuntimeException("Error durring SSH command execution. Command");
} catch (IOException e) {
    throw new RuntimeException(e);
} finally {
    this.disConnectSSH();
  }
}

disconnect

private void disConnectSSH() {
  if (session != null) session.disconnect();
  if (channelExec != null) channelExec.disconnect();
}