使用JSCH框架通过跳转机访问其他节点的方法

 public static ChannelSftp connect(String ip, String userName, String pwd, int port) throws JSchException {  if (port <= 0)  {   port = PORT;  }  Session sshSession = null;  JSch jsch = new JSch();  sshSession = jsch.getSession(userName, ip, port);    sshSession.setPassword(pwd);  Properties sshConfig = new Properties();  sshConfig.put("StrictHostKeyChecking", "no");  sshConfig.put("PreferredAuthentications",    "password,keyboard-interactive");  sshSession.setConfig(sshConfig);      sshSession.connect(TMOUT);//可设置超时时间   //此处开始为端口映射到本地的部分  sshSession.setPortForwardingL(本地端口, 目标节点地址, 22);  //完成上诉映射之后，即可通过本地端口连接了  Session session = jsch.getSession("目标服务用户名", "127.0.0.1",本地端口);  Properties remoteCfg = new Properties();  remoteCfg.put("StrictHostKeyChecking", "no");  remoteCfg.put("PreferredAuthentications",    "password,keyboard-interactive");  session.setConfig(remoteCfg);  session.setPassword("目标服务密码");  session.connect();  //后续如何可自行改变，网上运用很多  Channel channel = (Channel) session.openChannel("sftp");//创建sftp通信通道   channel.connect();  ChannelSftp sftp = (ChannelSftp) channel;    return sftp; }