public static void deleteFolders(String filePath) {

        Path path = Paths.get(filePath);
        try {
            Files.walkFileTree(path, new SimpleFileVisitor<Path>() {
                @Override
                public FileVisitResult visitFile(Path file, BasicFileAttributes attributes) throws IOException {
                    Files.delete(file);
                    log.info("刪除文件: {}", file);
                    return FileVisitResult.CONTINUE;
                }

                @Override
                public FileVisitResult postVisitDirectory(Path dir,
                                                          IOException exc) throws IOException {
                    Files.delete(dir);
                    log.info("文件夾被刪除: {}", dir);
                    return FileVisitResult.CONTINUE;
                }
            });
        } catch (IOException e) {
            e.printStackTrace();
        }
    }