long l; Date date; LocalDateTime localDateTime; Timestamp timestamp; Calendar c; String str; Instant instant; ZoneId zoneId = ZoneId.of("UTC+8").normalized(); SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");快捷查询窗口:
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- long->long
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- long->Date
new Date(long)
- long->LocalDateTime
LocalDateTime.ofEpochSecond(timestamp / 1000, (int) (timestamp % 1000), ZoneOffset.of(zoneId.getId()));
- long->Timestamp
new Timestamp(time)
- long->Calendar
Calendar c = Calendar.getInstance(); c.setTimeInMillis(time);
- long->String
format.format(new Date(time));
- long->Instant
Instant.ofEpochMilli(l)
- Date->long
date.getTime();
- Date->Date
=
- Date->LocalDateTime
LocalDateTime.ofInstant(date.toInstant(), zoneId);
- Date->Timestamp
Timestamp.from(date.toInstant());
- Date->Calendar
Calendar c = Calendar.getInstance(); c.setTime(date);
- Date->String
format.format(date);
- Date->Instant
date.toInstant()
- LocalDateTime->long
ZonedDateTime zdt = localDateTime.atZone(zoneId); l = zdt.toEpochSecond() * 1000 + zdt.getNano();
- LocalDateTime->Date
Date.from(localDateTime.atZone(zoneId).toInstant());
- LocalDateTime->LocalDateTime
=
- LocalDateTime->Timestamp
Timestamp.from(localDateTime.atZone(zoneId).toInstant());
- LocalDateTime->Calendar
Calendar c = Calendar.getInstance(); c.setTime(Date.from(localDateTime.atZone(zoneId).toInstant()));
- LocalDateTime->String
localDateTime.format(dateTimeFormatter)
- LocalDateTime->Instant
localDateTime.toInstant(ZoneOffset.of(zoneId.getId()));
- Timestamp->long
timestamp.getTime()
- Timestamp->Date
=
- Timestamp->LocalDateTime
LocalDateTime.ofInstant(timestamp.toInstant(), zoneId);
- Timestamp->Timestamp
=
- Timestamp->Calendar
Calendar c = Calendar.getInstance(); c.setTime(timestamp);
- Timestamp->String
format.format(timestamp);
- Timestamp->Instant
timestamp.toInstant()
- Calendar->long
c.getTimeInMillis()
- Calendar->Date
c.getTime()
- Calendar->LocalDateTime
LocalDateTime.ofInstant(c.toInstant(), zoneId);
- Calendar->Timestamp
Timestamp.from(c.toInstant())
- Calendar->Calendar
=
- Calendar->String
simpleDateFormat.format(c.getTime());
- Calendar->Instant
c.toInstant()
- String->long
simpleDateFormat.parse(str).getTime();
- String->Date
simpleDateFormat.parse(str);
- String->LocalDateTime
LocalDateTime.parse("2018-01-26T17:34:41.000")
- String->Timestamp
Timestamp.valueOf("2018-01-26 17:34:41.000");
- String->Calendar
- String->String
=
- String->Instant
- Instant->long
instant.toEpochMilli()
- Instant->Date
Date.from(instant)
- Instant->LocalDateTime
LocalDateTime.ofInstant(instant, zoneId);
- Instant->Timestamp
Timestamp.from(instant)
- Instant->Calendar
Calendar c = Calendar.getInstance(); c.setTimeInMillis(instant.toEpochMilli());
- Instant->String
- Instant->Instant
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