java如何通过共享目录下载文件夹（有子文件夹）到本地目录？

有没有大神会操作的？

下面的代码只能下载文件夹下只是文件的，不能下载文件夹下包含子文件夹的文件

public static void getShareFile(){
        System.out.println("开始");
        NtlmPasswordAuthentication auth = new NtlmPasswordAuthentication("192.168.6.88","user1","voicecyber@123");
        String url = "smb://192.168.6.88/tomcat/";
        try{
            SmbFile file = new SmbFile(url,auth);
            if(file.exists()){
                SmbFile[] files = file.listFiles();
                for(SmbFile f : files){

                    String localDir = "F:\\vcc\\";
                    InputStream in = new BufferedInputStream(new SmbFileInputStream(f));
                    File localFile = new File(localDir + File.separator + f.getName());
                    OutputStream out = new BufferedOutputStream(new FileOutputStream(localFile));
                    System.out.println(f.getContentLength());
                    byte[] buffer = new byte[1024];
                    while(in.read(buffer) != -1){
                        out.write(buffer);
                        buffer = new byte[1024];
                    }
                    in.close();
                    out.close();
                }
            }else {
                logger.info("共享目录不存在");
            }
        }catch(Exception e){
            e.printStackTrace();
        }
    }