java 删除所有早于N天的文件(递归选项，它遍历子文件夹)

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public static void recursiveDeleteFilesOlderThanNDays(int days, String dirPath) throws IOException {     long cutOff = System.currentTimeMillis() - (days * 24 * 60 * 60 * 1000);     Files.list(Paths.get(dirPath))     .forEach(path -> {         if (Files.isDirectory(path)) {             try {                 recursiveDeleteFilesOlderThanNDays(days, path.toString());             } catch (IOException e) {                 // log here and move on             }         } else {             try {                 if (Files.getLastModifiedTime(path).to(TimeUnit.MILLISECONDS) < cutOff) {                     Files.delete(path);                 }             } catch (IOException ex) {                 // log here and move on             }         }     }); }