java日期间相隔年月日计算-蒲公英云

java日期间相隔年月日计算

Myth丶恋晨 2021-11-11 13:34 466阅读 0赞

/**
* 获取date1相距date2多少天， date2>date1
* @param date1
* @param date2
* @return
* @throws ParseException
*/
public static int getDaysSpace(String date1,String date2){
Calendar cal = Calendar.getInstance();
cal.setTime(getDate(date1, “yyyyMMdd”));
long time1 = cal.getTimeInMillis();
cal.setTime(getDate(date2, “yyyyMMdd”));
long time2 = cal.getTimeInMillis();
long between_days=(time2-time1)/(1000*3600*24);
return Integer.parseInt(String.valueOf(between_days));
}

/**
* 获取date1相距date2几个月， date2>date1
* @param date1
* @param date2
* @return
* @throws ParseException
*/
public static float getMonthSpace(String date1, String date2){
float result = 0;
Calendar c1 = Calendar.getInstance();
Calendar c2 = Calendar.getInstance();
c1.setTime(getDate(date1, “yyyyMMdd”));
c2.setTime(getDate(date2, “yyyyMMdd”));
if(c2.get(Calendar.DATE) - c1.get(Calendar.DATE) >= 0){
result = (c2.get(Calendar.YEAR) - c1.get(Calendar.YEAR)) * 12.0f + (c2.get(Calendar.MONTH) - c1.get(Calendar.MONTH)) + (c2.get(Calendar.DATE) - c1.get(Calendar.DATE))/30.0f;
}else{
result = (c2.get(Calendar.YEAR) - c1.get(Calendar.YEAR)) * 12.0f + (c2.get(Calendar.MONTH) - c1.get(Calendar.MONTH)) - 1.0f + (c2.get(Calendar.DATE) - c1.get(Calendar.DATE))/30.0f;
}
DecimalFormat df = new DecimalFormat(“0.00”);
return Float.parseFloat(df.format(result));
}

/**
* 获取date1相距date2几年， date2>date1
* @param date1
* @param date2
* @return
* @throws ParseException
*/
public static float getYearSpace(String date1, String date2) {
DecimalFormat df = new DecimalFormat(“0.00”);
return Float.parseFloat(df.format(getMonthSpace(date1, date2)/12.0f));
}

转载于//www.cnblogs.com/Jiphen/p/6180354.html