参数申明：
1 final Date date = new Date(); 2 final Timestamp timestamp = new Timestamp(date.getTime()); 3 final Calendar calendar = Calendar.getInstance(); 4 final Instant instant = Instant.now(); 5 final LocalDateTime localDateTime = LocalDateTime.now(); 6 final ZonedDateTime zonedDateTime = ZonedDateTime.now(); 7 final LocalDate localDate = LocalDate.now();
转Instant
1 //Date转Instant 2 Instant dateInstant = date.toInstant(); 3 //Timestamp转Instant 4 Instant timestampInstant = timestamp.toInstant(); 5 //Calendar转Instant 6 Instant calendarInstant = calendar.toInstant(); 7 //LocalDateTime转Instant 8 Instant localDateTimeInstant = localDateTime.atZone(ZoneId.systemDefault()).toInstant(); 9 //ZonedDateTime转Instant 10 Instant zonedDateTimeInstant = zonedDateTime.toInstant(); 11 //LocalDate转Instant 12 Instant localDateInstant = localDate.atStartOfDay(ZoneId.systemDefault()).toInstant();
转LocalDateTime
1 //Date转LocalDateTime 2 LocalDateTime dateLocalDateTime = LocalDateTime.ofInstant(date.toInstant(), ZoneId.systemDefault()); 3 //Timestamp转LocalDateTime 4 LocalDateTime timestampLocalDateTime = timestamp.toLocalDateTime(); 5 //Calendar转LocalDateTime 6 LocalDateTime calendarLocalDateTime = LocalDateTime.ofInstant(calendar.toInstant(), ZoneOffset.systemDefault()); 7 //Instant转LocalDateTime 8 LocalDateTime instantLocalDateTime = LocalDateTime.ofInstant(instant, ZoneId.systemDefault()); 9 //ZonedDateTime转LocalDateTime 10 LocalDateTime zonedDateTimeLocalDateTime = zonedDateTime.toLocalDateTime(); 11 //LocalDate转LocalDateTime 12 LocalDateTime localDateLocalDateTime = localDate.atStartOfDay();
转ZonedDateTime
1 //Date转ZonedDateTime 2 ZonedDateTime dateZonedDateTime = ZonedDateTime.ofInstant(date.toInstant(), ZoneId.systemDefault()); 3 //Timestamp转ZonedDateTime 4 ZonedDateTime timestampZonedDateTime = ZonedDateTime.ofInstant(timestamp.toInstant(), ZoneId.systemDefault()); 5 //Calendar转ZonedDateTime 6 ZonedDateTime calendarZonedDateTime = ZonedDateTime.ofInstant(calendar.toInstant(), ZoneId.systemDefault()); 7 //Instant转ZonedDateTime 8 ZonedDateTime instantZonedDateTime = instant.atZone(ZoneId.systemDefault()); 9 //LocalDateTime转ZonedDateTime 10 ZonedDateTime localDateTimeZonedDateTime = localDateTime.atZone(ZoneId.systemDefault()); 11 //LocalDate转ZonedDateTime 12 ZonedDateTime localDateZonedDateTime = localDate.atStartOfDay(ZoneId.systemDefault());
转Date
1 //Timestamp转Date 2 Date timestampDate = new Date(timestamp.getTime()); 3 //Calendar转Date 4 Date calendarDate = calendar.getTime(); 5 //Instant转Date 6 Date instantDate = Date.from(instant); 7 //LocalDateTime转Date 8 Date localDateTimeDate = Date.from(localDateTime.atZone(ZoneId.systemDefault()).toInstant()); 9 //ZonedDateTime转Date 10 Date zonedDateTimeDate = Date.from(zonedDateTime.toInstant()); 11 //LocalDate转Date 12 Date localDateDate = Date.from(localDate.atStartOfDay(ZoneId.systemDefault()).toInstant());
转Timestamp
1 //Date转Timestamp 2 Timestamp dateTimestamp = new Timestamp(date.getTime()); 3 //Calendar转Timestamp 4 Timestamp calendarTimestamp = new Timestamp(calendar.getTimeInMillis()); 5 //Instant转Timestamp 6 Timestamp instantTimestamp = Timestamp.from(instant); 7 //LocalDateTime转Timestamp 8 Timestamp localDateTimeTimestamp = Timestamp.valueOf(localDateTime); 9 //ZonedDateTime转Timestamp 10 Timestamp zonedDateTimeTimestamp = Timestamp.from(zonedDateTime.toInstant()); 11 //LocalDate转Timestamp 12 Timestamp localDateTimestamp = Timestamp.valueOf(localDate.atStartOfDay());
转Calendar
1 //Date转Calendar 2 Calendar dateCalendar = Calendar.getInstance(); 3 dateCalendar.setTime(date); 4 //Timestamp转Calendar 5 Calendar timestampCalendar = Calendar.getInstance(); 6 timestampCalendar.setTimeInMillis(timestamp.getTime()); 7 //Instant转Calendar 8 Calendar instantCalendar = GregorianCalendar.from(ZonedDateTime.ofInstant(instant, ZoneId.systemDefault())); 9 //LocalDateTime转Calendar 10 Calendar localDateTimeCalendar = GregorianCalendar.from(ZonedDateTime.of(localDateTime, ZoneId.systemDefault())); 11 //ZonedDateTime转Calendar 12 Calendar zonedDateTimeInstantCalendar = GregorianCalendar.from(zonedDateTime); 13 //LocalDate转Calendar 14 Calendar localDateCalendar = GregorianCalendar.from(localDate.atStartOfDay(ZoneId.systemDefault()));
转LocalDate
1 //Date转LocalDate 2 LocalDate dateLocalDate = LocalDate.ofInstant(date.toInstant(), ZoneId.systemDefault()); //jdk11 3 LocalDate dateLocalDate = LocalDateTime.ofInstant(date.toInstant(), ZoneId.systemDefault()).toLocalDate(); 4 //Timestamp转LocalDate 5 LocalDate timestampLocalDate = timestamp.toLocalDateTime().toLocalDate(); 6 //Calendar转LocalDate 7 LocalDate calendarLocalDate = LocalDate.ofInstant(calendar.toInstant(), ZoneOffset.systemDefault()); //jdk11 8 LocalDate calendarLocalDate = LocalDateTime.ofInstant(calendar.toInstant(), ZoneOffset.systemDefault()).toLocalDate(); 9 //Instant转LocalDate 10 LocalDate instantLocalDate = LocalDate.ofInstant(instant, ZoneId.systemDefault()); //jdk11 11 LocalDate instantLocalDate = LocalDateTime.ofInstant(instant, ZoneId.systemDefault()).toLocalDate(); 12 //LocalDateTime转LocalDate 13 LocalDate localDateTimeLocalDate = localDateTime.toLocalDate(); 14 //ZonedDateTime转LocalDate 15 LocalDate zonedDateTimeLocalDate = zonedDateTime.toLocalDate();