1、Timestamp(long)转成日期  

  Timestamp timestamp = new Timestamp(System.currentTimeMillis());

     LocalDateTime localDateTime = timestamp.toLocalDateTime();  //之后就可以通过java8 新API操作时间了

  localDateTime.toLocalDate();  

  Date date = new Date(timestamp.getTime());  //以前的Timetamp转日期的写法,然后通过SimpleDateFormatter转化了

 2、Date与LocalDateTime的互相转换

/**
* LocalDateTime转Date
* @param localDateTime
* @return
*/
public static Date localDateTime2Date(LocalDateTime localDateTime){
ZoneId zoneId = ZoneId.systemDefault();
ZonedDateTime zonedDateTime = localDateTime.atZone(zoneId);
Date date = Date.from(zonedDateTime.toInstant());
return date;
}

/**
* Date转LocalDateTime
* @param date
* @return
*/
public static LocalDateTime Date2LocalDateTime(Date date){
Instant instant = date.toInstant();
ZoneId zoneId = ZoneId.systemDefault();
LocalDateTime localDateTime = instant.atZone(zoneId).toLocalDateTime();
return localDateTime;
}

 

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