Java Date型⇔LocalDateTimeの変換

//Date型⇒LocalDateTime型に変換
Date d = new Date();
Instant instant = d.toInstant();
LocalDateTime ldt = LocalDateTime.ofInstant(instant, ZoneId.systemDefault());

//LocalDateTime型⇒Date型に変換
Date date = Date.from(ldt.atZone(ZoneId.systemDefault()).toInstant());