[java]代码库
public class T5 {
	public static void main(String[] args) {
		Date date = new Date();
		long dateTime = date.getTime();
		String newDateString = "2023-01-22 00:00:00";
		SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-DD HH:mm:ss");
		try {
			Date newYearDate = simpleDateFormat.parse(newDateString);
			long newYearDateTime = newYearDate.getTime();
			long result = newYearDateTime - dateTime;
			long dayNums = result / 1000 / 60 / 60 / 24;
			System.out.println(dayNums);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}