递归删除大于30天的旧日志

/**
     * 递归删除大于30天的旧日志
     */
    private static void deleteOldLogFiles(File dir) {
        if (dir.isDirectory()) {
            File[] files = dir.listFiles();
            if (files != null) {
                for (File file : files) {
                    deleteOldLogFiles(file);
                }
            }
        }
//        System.out.println(dir.getName());
//        System.out.println(dir.getName().endsWith(".log"));
        String replace = dir.getName().replace(".log", "");
        System.out.println(replace);
//        System.out.println(compare(replace));
        if (dir.getName().endsWith(".log") && compare(replace)) {
            boolean delete = dir.delete();
            System.out.println("delete = " + delete);
        }
    }

    /**
     * @return 相差大于30天
     */
    private static boolean compare(String oldFileName) {
        try {
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd", Locale.getDefault());
            //跨年不会出现问题
            //如果时间为：2016-03-18 11:59:59 和 2016-03-19 00:00:01的话差值为 0
            String curDate = sdf.format(new Date());
//        Date newDate = sdf.parse("2022-12-25");
            long days = 0;
            days = (new Date().getTime() - sdf.parse(oldFileName).getTime()) / (1000 * 3600 * 24);
//            System.out.print(days);
            return days > 30;
        } catch (ParseException e) {
            return false;
        }
    }