smbj:我怎样才能只得到子目录？

import com.hierynomus.msdtyp.AccessMask;
import com.hierynomus.mssmb2.SMB2CreateDisposition;
import com.hierynomus.mssmb2.SMB2CreateOptions;
import com.hierynomus.mssmb2.SMB2ShareAccess;
import com.hierynomus.smbj.SMBClient;
import com.hierynomus.smbj.auth.AuthenticationContext;
import com.hierynomus.smbj.session.Session;
import com.hierynomus.smbj.share.DiskShare;
import com.hierynomus.smbj.share.File;
import com.hierynomus.smbj.share.FileIdBothDirectoryInformation;

import java.util.List;

public class SMBJExample {
    public static void main(String[] args) {
        String serverName = "smb://your-server-name";
        String username = "your-username";
        String password = "your-password";
        String sharedFolder = "shared-folder-path";

        SMBClient client = new SMBClient();
        try {
            // 建立连接
            AuthenticationContext auth = new AuthenticationContext(username, password.toCharArray(), null);
            Session session = client.connect(serverName).authenticate(auth);

            // 打开共享文件夹
            DiskShare share = (DiskShare) session.connectShare(sharedFolder);

            // 获取子目录
            List<FileIdBothDirectoryInformation> fileList = share.list("");
            for (FileIdBothDirectoryInformation fileInfo : fileList) {
                File file = share.openFile(fileInfo.getFileName(), new AccessMask().setFileReadAttributes());
                if (file.isDirectory()) {
                    System.out.println("子目录：" + fileInfo.getFileName());
                }
                file.close();
            }

            // 关闭连接
            share.close();
            session.close();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            client.close();
        }
    }
}