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我有一个Map人的生日GregorianCalendar.

例如:

{
    motherEmailID=null,
    coreType=Ticket,
    _NULL=null,
    additionalFaclitiesProvided=[],
    dateOfBirth=java.util.GregorianCalendar[
        time=585340200000,
        areFieldsSet=false,
        areAllFieldsSet=false,
        lenient=true,
        zone=sun.util.calendar.ZoneInfo[id="GMT",
    offset=0,
    dstSavings=0,
    useDaylight=false,
    transitions=0,
    lastRule=null],
        firstDayOfWeek=1,
        minimalDaysInFirstWeek=1,
        ERA=1,
        YEAR=1988,
        MONTH=6,
        WEEK_OF_YEAR=30,
        WEEK_OF_MONTH=4,
        DAY_OF_MONTH=20,
        DAY_OF_YEAR=202,
        DAY_OF_WEEK=4,
        DAY_OF_WEEK_IN_MONTH=3,
        AM_PM=0,
        HOUR=0,
        HOUR_OF_DAY=0,
        MINUTE=0,
        SECOND=0,
        MILLISECOND=0,
        ZONE_OFFSET=19800000,
        DST_OFFSET=0],
    targetEnd=null,
    year_semester=null
}

我需要一个Date,但在我的数据库中它只是Calendar格式化的.数据库中列的数据类型是DateTime.如何以Date格式获取生日？

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