[Java] LocalDateTime, Timestamp 변환

- @참고: codechacha.com/ko/java-convert-localdatetime-to-timestamp/

- @참고(LocalDateTime 시간 더하기): jekalmin.tistory.com/entry/%EC%9E%90%EB%B0%94-18-%EB%82%A0%EC%A7%9C-%EC%A0%95%EB%A6%AC

 

LocalDateTime <-> Timestamp

LocalDateTime localDateTime = LocalDateTime.now(); //2019-10-31T08:45:54.874

// LocalDateTime -> Timestamp
Timdstamp timestamp = Timestamp.valueOf(localDateTime); //2019-10-31 08:45:54.874

// Timestamp -> LocalDateTime
LocalDateTime localDateTime = timestamp.toLocalDateTime() //2019-10-31T08:45:54.874

 

LocalDateTime 시간 더하기

LocalDateTime.of(2015, 4, 17, 23, 47, 5).minus(Period.ofWeeks(3)); //(2015년4월17일 23시47분05초 - 3주간) = 2015년3월27일 23시47분05초