Java 判断两个日期相差多少天

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.");

}

}