java将时间按月分段 返回分段的数组
/**
* 按照月份分割一段时间
*
* @param startTime 开始时间戳(毫秒)
* @param endTime 结束时间戳(毫秒)
*/
public static List<Long> getIntervalTimeByMonth(Date startTime, Date endTime) {
List<Long> dateList = new ArrayList<>();
Calendar calendar = Calendar.getInstance();
calendar.setTime(startTime);
dateList.add(calendar.getTimeInMillis());
while (calendar.getTimeInMillis() < endTime.getTime()) {
// 当月底
calendar.add(Calendar.MONTH, 1);
calendar.set(Calendar.DAY_OF_MONTH, 1);
calendar.add(Calendar.DATE, -1);
calendar.set(Calendar.HOUR_OF_DAY, 23);
calendar.set(Calendar.MINUTE, 59);
calendar.set(Calendar.SECOND, 59);
if(calendar.getTimeInMillis() >= endTime.getTime()){
dateList.add(endTime.getTime());
break;
}
// 下月初
calendar.add(Calendar.DATE, 1);
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
dateList.add(calendar.getTimeInMillis());
}
return dateList;
}
测试代码:
public static void main(String[] args) throws ParseException {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date beginDate = sdf.parse("2021-06-15");
Date endDate = sdf.parse("2022-06-15");
List<Long> endDateList = getIntervalTimeByMonth(beginDate, endDate);
for (int i = 0; i < endDateList.size(); i++) {
Long beginStr = endDateList.get(i);
String begin1 = sdf1.format(new Date(beginStr));
System.out.println("第" + i + "段时间区间:" + begin1);
}
}
参考
https://www.zhangshengrong.com/p/LKa40OkZaQ/