Java判断两个日期相差天数的方法

Java判断两个日期相差天数的方法

本文实例讲述了java判断两个日期相差天数的方法。分享给大家供大家参考。具体如下：

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, 01CxfmP);

long milliseconds1 = calendar1.getTimeInMillis();

long milliseconds2 = calendar2.getTimeInMillis();

long diff = milliseconds2 - milliseconds1;

long diffSeconds = diff / 1000;

long diffMinhttp://utes = 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.");

}

}

把上面的代码放在项目里使用了一下，【求日期部分】是要满24小时才算一天的，不太适应项目的需求，故改成这样子。

/**

* 得到两个日期相差的天数

*/

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);

http:// 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;

}

希望本文所述对大家的java程序设计有所帮助。

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