如何将Gregorian字符串转换为Gregorian Calendar？ [英] How to convert Gregorian string to Gregorian Calendar?

问题描述

我必须根据日历的日期计算一些东西，但我收到了完整的格里高利日历的字符串值。

例如接收到 {可能是 - new GregorianCalendar（）。toString（）} as String： - java.util.GregorianCalendar [time = 1410521241348，areFieldsSet = true，areAllFieldsSet = true，lenient = true，zone = sun.util.calendar.ZoneInfo [id =Europe / London，offset = 0，dstSavings = 3600000，useDaylight = true，transitions = 242 ，lastRule = java.util.SimpleTimeZone [id = Europe / London，offset = 0，dstSavings = 3600000，useDaylight = true，startYear = 0，startMode = 2，startMonth = 2，startDay = -1，startDayOfWeek = 1，startTime = 3600000，startTimeMode = 2，endMode = 2，endMonth = 9，endDay = -1，endDayOfWeek = 1，endTime = 3600000，endTimeMode = 2]]，firstDayOfWeek = 1，minimalDaysInFirstWeek = 1，ERA = 1，YEAR = = 8，WEEK_OF_YEAR = 37，WEEK_OF_MONTH = 2，DAY_OF_MONTH = 12，DAY_OF_YEAR = 255，DAY_OF_WEEK = 6，DAY_OF_WEEK_IN_MONTH = 2，AM_PM = 1，HOUR = 0，HOUR_OF_DAY = 12，MINUTE = 27，SECOND = 21，MILLISECOND = 348 ，ZONE_OFFSET = 0，DST_OFFSET = 3600000]

我想提取日历的日期值以进一步计算。

解决方案

其他答案太复杂或错误。以下将为您提供自纪元以来的毫秒，这是一个通用时间戳，可以轻松转换为大多数时间表示类，包括日历 日期：

 模式gregorianPattern = Pattern.compile util.GregorianCalendar\\ [time =（\\d +）。*）; 
 
 Matcher matcher = gregorianPattern.matcher（param）; 
 if（matcher.matches（））{
 return Long.parseLong（matcher.group（1））; 
} 
  

I have to compute something based on the Calendar's date, but I am receiving the complete Gregorian Calendar's String value.

Eg i/p received {may be - "new GregorianCalendar().toString()"} as String :- java.util.GregorianCalendar[time=1410521241348,areFieldsSet=true,areAllFieldsSet=true,lenient=true,zone=sun.util.calendar.ZoneInfo[id="Europe/London",offset=0,dstSavings=3600000,useDaylight=true,transitions=242,lastRule=java.util.SimpleTimeZone[id=Europe/London,offset=0,dstSavings=3600000,useDaylight=true,startYear=0,startMode=2,startMonth=2,startDay=-1,startDayOfWeek=1,startTime=3600000,startTimeMode=2,endMode=2,endMonth=9,endDay=-1,endDayOfWeek=1,endTime=3600000,endTimeMode=2]],firstDayOfWeek=1,minimalDaysInFirstWeek=1,ERA=1,YEAR=2014,MONTH=8,WEEK_OF_YEAR=37,WEEK_OF_MONTH=2,DAY_OF_MONTH=12,DAY_OF_YEAR=255,DAY_OF_WEEK=6,DAY_OF_WEEK_IN_MONTH=2,AM_PM=1,HOUR=0,HOUR_OF_DAY=12,MINUTE=27,SECOND=21,MILLISECOND=348,ZONE_OFFSET=0,DST_OFFSET=3600000]

I want to extract the Calendar's date value to process further computation.

解决方案

Other answers are too complicated or wrong. The following will give you the milliseconds since the epoch, which is a universal timestamp that you can easily convert to most time representation classes, including Calendar or Date:

Pattern gregorianPattern = Pattern.compile("^java.util.GregorianCalendar\\[time=(\\d+).*"); 

Matcher matcher = gregorianPattern.matcher(param);
if(matcher.matches()) {
    return Long.parseLong(matcher.group(1));
}

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