迭代列印子目錄中的目錄

  public void iterate(final String dirPath) throws IOException {
    final DirectoryStream<Path> paths = Files.newDirectoryStream(Paths.get(dirPath));
    for (final Path path : paths) {
      if (Files.isDirectory(path)) {
        System.out.println(path.getFileName());
      }
    }
  }