计算日期间相差天数 Java代码实现

    private int getDays(String startDate, String endDate) {        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");        /** 计算起止日期间的天数 */        int range = 0;        try {            long to = sdf.parse(endDate).getTime();            long from = sdf.parse(startDate).getTime();            range = (int) ((to - from) / (1000 * 60 * 60 * 24));        } catch (Exception e) {            e.printStackTrace();            range = 0;        }        return range;    }