Java计算两个日期相差天数，java日期相差天数,import java.

Java计算两个日期相差天数，java日期相差天数,import java.

import java.util.*;public class Test {    public static void main(String args[]) {        Calendar calendar = Calendar.getInstance();        calendar.setTime(new Date());        calendar.set(1991, 7, 7);        long time_1 = calendar.getTimeInMillis();        calendar.set(2012, 8, 31);        long time_2 = calendar.getTimeInMillis();        long space = (time_2 - time_1) / (1000 * 60 * 60 * 24);        System.out.println("至今我活了大约 " + space + " 天");    }}