时间戳转换

        String format = "yyyy-MM-dd";
        String dateStr = "2021-10-14";
        SimpleDateFormat sdf = new SimpleDateFormat(format);
        try {
            String s = String.valueOf(sdf.parse(dateStr).getTime() / 1000);
            System.out.println("sss:"+s);
        } catch (ParseException e) {
            e.printStackTrace();
        }