Java中时间戳与Date/LocalDateTime的相互转换

一、时间戳与Date相互转换#

1. 时间戳转Date#

public static void timestamp2Date() {
	long timeMillis = System.currentTimeMillis();
	Date date = new Date(timeMillis);
}

2. Date转时间戳#

public static void date2Timestamp() {
	Date date = new Date();
	long timeMillis = date.getTime();
}

二、时间戳与LocalDateTime相互转换#

1. 时间戳转LocalDateTime#

public static void timestamp2LocalDateTime() {
	long timeMillis = System.currentTimeMillis();
	ZoneId zoneId = ZoneId.systemDefault();
	LocalDateTime localDateTime = Instant.ofEpochMilli(timeMillis).atZone(zoneId).toLocalDateTime();
}

2. LocalDateTime转时间戳#

public static void localDateTime2Timestamp() {
	ZoneId zoneId = ZoneId.systemDefault();
	LocalDateTime now = LocalDateTime.now();
	long epochMilli = now.atZone(zoneId).toInstant().toEpochMilli();
}