jodatime - Joda 使用正确的 DateTimeZone 解析 24 小时时间模式

Question

我又一次在时间戳、日期等问题上苦苦挣扎。

我有以下课程：

public class TimeConverter {
    private static final String TAG = TimeConverter.class.getSimpleName();

    public static final String PATTERN_TIME_24H = "HH:mm";


    /**
     * Returns a DateTime object for a given string in format HH:mm, assuming that the day is TODAY in UTC.
     *
     * @param timeString24h  - The string representing the time in format HH:mm
     * @param dateUTCseconds - The UTC timestamp to get the correct date for the given timeString24h
     * @return DateTime object for the given time where actual date is derived from dateUTCseconds
     */
    public static DateTime getDateTimeFrom24hString(final String timeString24h, final long dateUTCseconds) {
        final LocalDate localDate = new LocalDate(dateUTCseconds * 1000, DateTimeZone.UTC);
        final DateTimeFormatter formatter = DateTimeFormat.forPattern(PATTERN_TIME_24H);
        DateTime dateTime = formatter.parseDateTime(timeString24h)
                .withDate(localDate);
        Log.d(TAG, "getDateTimeFrom24hString() --> input: " + timeString24h + ", output: " + dateTime.toString());
        return dateTime;
    }

    public static DateTime getDateTimeFromSeconds(final long timeSeconds, final DateTimeZone dateTimeZone) {
        final DateTime dateTime = new DateTime(timeSeconds * 1000, dateTimeZone);
        Log.d(TAG, "getDateTimeFromSeconds() --> input: " + timeSeconds + ", output: " + dateTime.toString());
        return dateTime;
    }

}

我getDateTimeFrom24hString用参数打电话：

• timeString24h= “16:03
• dateUTCseconds= 1547222580（格林威治标准时间 2019 年 1 月 11 日星期五 16:03:00）

返回：

2019-01-11T16:03:00.000+01:00

对于getDateTimeFromSeconds我正在使用的电话：

• timeSeconds= 1547222580
• dateTimeZone = DateTimeZone.UTC

返回：

2019-01-11T16:03:00.000Z

---

我该怎么做，这两个 DateTime 对象完全代表相同的时间？

编辑： 我的怀疑是，我必须在这里做点什么：

final DateTimeFormatter formatter = DateTimeFormat.forPattern(PATTERN_TIME_24H);
        //TODO: Need to "tell" the dateTime object, that the parsed date is already UTC time
        DateTime dateTime = formatter.parseDateTime(timeString24h)
                .withDate(localDate);

Answer 1

我刚刚找到了一个似乎可以解决问题的解决方案：

    public static DateTime getDateTimeFrom24hString(final String timeString24h, final long dateUTCseconds) {
        final LocalDate localDate = new LocalDate(dateUTCseconds * 1000, DateTimeZone.UTC);

        final DateTimeFormatter formatter = DateTimeFormat.forPattern(PATTERN_TIME_24H);
        DateTime dateTime = formatter.parseDateTime(timeString24h)
                .withDate(localDate);

        DateTime dateTimeUtc = new DateTime(DateTimeZone.UTC)
                .withDate(localDate)
                .withTime(dateTime.toLocalTime());

        return dateTimeUtc;
    }