java8 日期工具

1.返回当前日期days天之后的日期和时间

public static Date getPlusDateTime(long days){
	LocalTime localTime = LocalTime.now();
	LocalDate localDate = LocalDate.now();
	localDate = localDate.plusDays(days);
	LocalDateTime localDateTime = LocalDateTiem.of(localDate,localTime);
	ZoneId zone = ZoneId.systemDefault();
	Instant instant = localDateTime.atZone(zone).toInstant();
	return Date.from(instant);
}

2.返回当前日期days天之后的日期

public static Date getPlusDate(long days){
	LocalDate localDate = LocalDate.now();
	localDate = localDate.plusDays(days);
	ZoneId zone = ZoneId.systemDefault();
	Instant instant = localDate.atStartofDay().atZone(zone).toInstant();
	return Date.from(instant);
}

3.返回格式yyyy-MM-dd格式的字符串

public static String getDateString(){
	LocalDate localDate = LocalDate.now();
	DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
	return localDate .format(formatter);
}