docs: @Override
  	public boolean cd(String directory) {
  		if (StrUtil.isBlank(directory)) {
  			// 当前目录
  			return true;
  		}
  		try {
  			channel.cd(directory.replaceAll("\\\\", "/"));
  			return true;
  		} catch (SftpException e) {
  			return false;
  		}
  	}