如何将字符串转换为 xml 公历日期 java

Question

I am trying to convert String to gregoriancalendar date, it unable to convert. because, the string has different format. like ' 2015-05-22T16:28:40.317-04:00 '. I have seen some of the other examples, but they are not in this time format.

I am using something like below:

GregorianCalendar cal = new GregorianCalendar();
         cal.setTime(new SimpleDateFormat("yyyy-MM-ddTHH:mm:ss-SS:zz").parse(sampleDate));
         XMLGregorianCalendar calendar = DatatypeFactory.newInstance().newXMLGregorianCalendar( cal);

I even tried like this too:

gregory.setTime(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.S").parse(sampleDate));

Answer 1

If you check SimpleDateFormat doc, you will see that there's no T in the format pattern. In order to escape non-pattern characters, wrap them around single quotes ' as shown in this example (taken from the docs):

"hh 'o''clock' a, zzzz" -> 12 o'clock PM, Pacific Daylight Time

I think the proper format should be this:

String format = "yyyy-MM-dd'T'HH:mm:ss.SSSX";
//                         ^-^-----check these
// don't pay attention to the smiley generated above, they're arrows ;)
GregorianCalendar cal = new GregorianCalendar();
     cal.setTime(new SimpleDateFormat(format).parse(sampleDate));
     XMLGregorianCalendar calendar = DatatypeFactory.newInstance().newXMLGregorianCalendar( cal);

Answer 2

This works as well

XMLGregorianCalendar xmlGregorianCalendar = DatatypeFactory.newInstance().newXMLGregorianCalendar("2015-05-22T16:28:40.317-04:00");
GregorianCalendar gregorianCalendar = xmlGregorianCalendar.toGregorianCalendar();

Answer 3

   try {
      DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-ddTHH:mm:ss-SS:zz");
      //dateFormat.setTimeZone(TimeZone.getTimeZone());
      Date inputDate = dateFormat.parse(inputDatetime);

      GregorianCalendar c = new GregorianCalendar();
      c.setTime(inputDate);

      XMLGregorianCalendar outputDate = DatatypeFactory.newInstance().newXMLGregorianCalendar(c);

      return outputDate;

    } catch (ParseException | DatatypeConfigurationException e) {
      log.error("exception: {}", e.getMessage());
      return null;
    }