Java计算两个时间相差的秒数

计算两个时间相差的秒数，直截了当，简单明了！

    public static void main(String[] args) throws ParseException {
        String startTime = "2021-10-18 14:05:00";
        String endTime = "2021-10-18 14:07:00";
        System.out.println(getTime(startTime, endTime));
    }

    //计算两个时间相差的秒数
    public static long getTime(String startTime, String endTime) throws ParseException {
        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        long eTime = df.parse(endTime).getTime();
        long sTime = df.parse(startTime).getTime();
        long diff = (eTime - sTime) / 1000;
        return diff;
    }