java 根据日期获取天数,java获取日期之间天数的方法
java获取日期之间天数的方法
本文实例讲述了java获取日期之间天数的方法。分享给大家供大家参考。具体实现方法如下：
private int daysBetween(Date now, Date returnDate) {
Calendar cNow = Calendar.getInstance();
Calendar cReturnDate = Calendar.getInstance();
cNow.setTime(now);
cReturnDate.setTime(returnDate);
setTimeToMidnight(cNow);
setTimeToMidnight(cReturnDate);
long todayMs = cNow.getTimeInMillis();
long returnMs = cReturnDate.getTimeInMillis();
long intervalMs = todayMs - returnMs;
return millisecondsToDays(intervalMs);
}
private int millisecondsToDays(long intervalMs) {
return (int) (intervalMs / (1000 * 86400));
}
private void setTimeToMidnight(Calendar calendar) {
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
java获取日期之间天数的方法 本文实例讲述了java获取日期之间天数的方法。分享给大家供大家参考。具体实现方法如下： private int daysBetween(Date now, Date returnDate) { Calendar cNow = Calendar.getInstance(); Calendar cReturnDate = Calendar.getInstance(); cNow.setTime(now); cReturnDate.setTime(returnDate); setTimeToMidnight(cNow); setTimeToMidnight(cReturnDate); long todayMs = cNow.getTimeInMillis(); long returnMs = cReturnDate.getTimeInMillis(); long intervalMs = todayMs - returnMs; return millisecondsToDays(intervalMs); } private int millisecondsToDays(long intervalMs) { return (int) (intervalMs / (1000 * 86400)); } private void setTimeToMidnight(Calendar calendar) { calendar.set(Calendar.HOUR_OF_DAY, 0); calendar.set(Calendar.MINUTE, 0); calendar.set(Calendar.SECOND, 0);