关于两个日期的时间差 java android

 计算两个日期之差，比如说租房软件，2017-02-08 租到2018-03-12 这其中是多少天呢。。

当然大家都会算，那么差多少个月 多少天么？

于是诞生了版本1

ong time = 205;   //天long year  = time / (365);long month = time % 365 /30;long day = time % 365 % 30; 这也简单。和计算时分秒的差不多，但是仔细想想按照需求还是差点。比如说2月到3月，对于房租按整月算还是差了点。房东可不干
于是诞生了第二版。由于时间关系，代码也不整理了，测试没问题就发了。大家可以测测。虽然这不是好习惯。剩下的交给需求的你们来完成了
	public static    String   getIntervalDate(Calendar c1,Calendar c2){	long milliseconds1 = c1.getTimeInMillis();        long milliseconds2 = c2.getTimeInMillis();        long diff = milliseconds2 - milliseconds1;        long time = diff / (24 * 60 * 60 * 1000);        System.out.PRintln("Time in days: " + time + " days.");        int strMon = 0;        int stryear = (c2.get(Calendar.YEAR) - c1.get(Calendar.YEAR));        int month = c2.get(Calendar.MONTH) - c1.get(Calendar.MONTH);                System.out.println("month" + month);               int day = c2.get(Calendar.DATE) - c1.get(Calendar.DATE);        if (day == 0) {            if (month == 0) {                if (stryear > 0) {                    System.out.println("最终==相差：" + stryear + "年" + month + "月" + day + "天");                               } else {                    System.out.println("当天算你麻痹");                    return "你麻痹 当天怎么算";                }            }            if (month > 0) {            	strMon=month;            	 System.out.println("最终==相差：" + (stryear - 1) + "年" + (strMon) + "月" + day + "天");	            }            if (month < 0) {            	stryear--;                System.out.println("最终==相差：" + (stryear - 1) + "年" + (strMon) + "月" + day + "天");                }            return  stryear + "~" + strMon  + "~" +  day;        } else if (day > 0) {            if (month == 0) {                strMon = 0;            }            if (month > 0) {                strMon = (c2.get(Calendar.MONTH) - c1.get(Calendar.MONTH));            }            if (month < 0) {                if (stryear > 0) {                    stryear--;                    strMon = 12-1;                } else {                    strMon = 12 - 1;                }            }            System.out.println("最终>>>>相差：" + stryear + "年" + (strMon) + "月" +day+ "天");                return stryear + "~" + (strMon) + "~" + day + "天";        } else if (day < 0) {            if (month <= 0) {                if (stryear > 0) {                    stryear--;                    strMon = 12;                }            }            if (month > 0) {                strMon = (c2.get(Calendar.MONTH) - c1.get(Calendar.MONTH));            }            System.out.println("最终<<<相差：" + stryear + "年" + (strMon - 1) + "月" + (c1.getMaximum(Calendar.DAY_OF_MONTH) - c1.get(Calendar.DAY_OF_MONTH) + c2.get(Calendar.DAY_OF_MONTH)));            return  stryear + "~" + (strMon - 1) + "~" + (c1.getMaximum(Calendar.DAY_OF_MONTH) - c1.get(Calendar.DAY_OF_MONTH) + c2.get(Calendar.DAY_OF_MONTH));        }        return null;	}	    public static void main(String[] args) {        Calendar c1 = Calendar.getInstance();        Calendar c2 = Calendar.getInstance();        c1.set(2017, 02, 19);        c2.set(2017, 02,20);        System.out.println( getIntervalDate(c1,c2));            }有的小伙伴可能会问，写这么乱还发，哈哈哈我愿意。时间关系代码就到这了，有好想法留言给我~ 
时间关系：下班了我要回家