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