datetime如何将UTC时间戳转换为其他区域时间戳，并在Java中提取日期、日数、日期、月、年、时间、时区

Question

我在一个json对象中收到一个UTC时间戳“2021-02-11T09:00:00-07:00--UTC”，它必须转换为其他区域时间戳。一旦转换成所需的区域时间戳，我需要提取日期， 日期、月份、年份、时间、时区，并将其存储在地图中

敬请告知

Answer 1

例如：

public static void main(String[] args) {
    String input = "2021-02-11T09:00:01-07:00  UTC";
    String timeStampCleanedUp = input.replaceFirst("\\s+ UTC", "");

    ZonedDateTime zonedDateTimeTmp = ZonedDateTime.parse(timeStampCleanedUp);

    //Conevert to other TimeZone, such as 'America/New_York':
    ZonedDateTime  zonedDateTime = zonedDateTimeTmp.withZoneSameInstant(ZoneId.of("America/New_York"));
    System.out.printf("Time stamp after zone time conversion: from '%s' to '%s'%n%n", zonedDateTimeTmp, zonedDateTime);

    //day, daynumber, date, month, year, time,timezone
    Map<String, String> result = new HashMap<>();

    result.put("DayOfWeek", zonedDateTime.getDayOfWeek().name()); //Day
    result.put("DayOfMonth", String.valueOf(zonedDateTime.getDayOfMonth())); //DayNumber
    result.put("Month", zonedDateTime.getMonth().name()); //Month
    result.put("Date", zonedDateTime.toLocalDate().toString()); //Date
    result.put("Month", zonedDateTime.getMonth().name()); //Month
    result.put("Year", String.valueOf(zonedDateTime.getYear())); //Year
    result.put("Time", zonedDateTime.toLocalTime().format(DateTimeFormatter.ISO_LOCAL_TIME)); //Time
    result.put("Offset", zonedDateTime.getOffset().getId()); //Offset
    result.put("TimeZone", zonedDateTime.getZone().getId()); //TimeZone

    result.keySet().stream().sorted().forEach(key -> System.out.printf("Key: '%s' => Value: '%s'%n", key, result.get(key)));
}

输出：

Time stamp after zone time conversion: from '2021-02-11T09:00:01-07:00' to '2021-02-11T11:00:01-05:00[America/New_York]'

Key: 'Date' => Value: '2021-02-11'
Key: 'DayOfMonth' => Value: '11'
Key: 'DayOfWeek' => Value: 'THURSDAY'
Key: 'Month' => Value: 'FEBRUARY'
Key: 'Offset' => Value: '-05:00'
Key: 'Time' => Value: '11:00:01'
Key: 'TimeZone' => Value: 'America/New_York'
Key: 'Year' => Value: '2021'

您可以使用ZoneId查看可用的区域ID。getAvailableZoneIds（）：

ZoneId.getAvailableZoneIds().stream().forEach(System.out::println);

您可以在此处阅读有关ZonId和ZoneOffset的更多信息： https://docs.oracle.com/javase/10/docs/api/java/time/ZoneId.html https://docs.oracle.com/javase/10/docs/api/java/time/ZoneOffset.html