자바/android 몇 년 월 일 시 분 초 전

참고 자료:
http://alexfc.iteye.com/blog/363185
http://biancheng.dnbcw.info/java/99937.html

        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        java.util.Date now = new Date();
        java.util.Date date = null;
        try {
            date = df.parse("2013-12-16 11:30:24");
        } catch (ParseException e) {
            e.printStackTrace();
            return "";
        }
        long difference = now.getTime() - date.getTime();
        long year = difference / 1000 / 60 / 60 / 24 / 30 / 12;
        long month = difference / 1000 / 60 / 60 / 24 / 30;
        long day = difference / (24 * 60 * 60 * 1000);
        long hour = (difference / (60 * 60 * 1000) - day * 24);
        long min = ((difference / (60 * 1000)) - day * 24 * 60 - hour * 60);
        long second = (difference / 1000 - day * 24 * 60 * 60 - hour * 60 * 60 - min * 60);

        System.out.println(year + " " + month + " " + day + " " + hour + "  " + min + " " + second + " ");