Java斷定兩個日期相差天數的辦法

Java斷定兩個日期相差天數的辦法。本站提示廣大學習愛好者：（Java斷定兩個日期相差天數的辦法）文章只能為提供參考，不一定能成為您想要的結果。以下是Java斷定兩個日期相差天數的辦法正文

本文實例講述了Java斷定兩個日期相差天數的辦法。分享給年夜家供年夜家參考。詳細以下：

import java.util.Calendar;
public class DateDifferent{
 public static void main(String[] args){
 Calendar calendar1 = Calendar.getInstance();
 Calendar calendar2 = Calendar.getInstance();
 calendar1.set(2007, 01, 10);
 calendar2.set(2007, 07, 01);
 long milliseconds1 = calendar1.getTimeInMillis();
 long milliseconds2 = calendar2.getTimeInMillis();
 long diff = milliseconds2 - milliseconds1;
 long diffSeconds = diff / 1000;
 long diffMinutes = diff / (60 * 1000);
 long diffHours = diff / (60 * 60 * 1000);
 long diffDays = diff / (24 * 60 * 60 * 1000);
 System.out.println("\nThe Date Different Example");
 System.out.println("Time in milliseconds: " + diff + " milliseconds.");
 System.out.println("Time in seconds: " + diffSeconds + " seconds.");
 System.out.println("Time in minutes: " + diffMinutes + " minutes.");
 System.out.println("Time in hours: " + diffHours + " hours.");
 System.out.println("Time in days: " + diffDays + " days.");
 }
}

把下面的代碼放在項目裡應用了一下，【求日期部門】是要滿24小時才算一天的，不太順應項目標需求，故改成如許子。

/**
 * 獲得兩個日期相差的天數
 */
public static int getBetweenDay(Date date1, Date date2) {
  Calendar d1 = new GregorianCalendar();
  d1.setTime(date1);
  Calendar d2 = new GregorianCalendar();
  d2.setTime(date2);
  int days = d2.get(Calendar.DAY_OF_YEAR)- d1.get(Calendar.DAY_OF_YEAR);
  System.out.println("days="+days);
  int y2 = d2.get(Calendar.YEAR);
  if (d1.get(Calendar.YEAR) != y2) {
//      d1 = (Calendar) d1.clone();
    do {
      days += d1.getActualMaximum(Calendar.DAY_OF_YEAR);
      d1.add(Calendar.YEAR, 1);
    } while (d1.get(Calendar.YEAR) != y2);
  }
  return days;
}

願望本文所述對年夜家的java法式設計有所贊助。