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My java 7 application consuming a service whcih is in Java 8 , i am receiving a date as string like

"2020-04-13T12:36:13Z"

which is actually a ZonedDateTime. i need to convert this string to XMLGregorianCalendar and send to another service ? Since my application is in java 7 i could not parse the string to ZonedDateTime . Is there any way i can do this conversion ?

VKP
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1 Answers1

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Easy when you know how.

    String receivedDateTimeString = "2020-04-13T12:36:13Z";
    
    XMLGregorianCalendar xmlgc = DatatypeFactory.newInstance()
            .newXMLGregorianCalendar(receivedDateTimeString);
    
    System.out.println(xmlgc);

Output:

2020-04-13T12:36:13Z

ZonedDateTime.toString() sometimes produces ISO 8601 format (and sometimes an extended format with a zone ID that is not part of ISO 8601). In your case you have got pure ISO 8601. Dates and times in XML documents use a variant of ISO 8601, it’s close enough that we can consider them the same for our purpose here. So an XMLGregorianCalendar instance is created directly from the ISO 8601 string, and its toString method produces the same ISO 8601 string back.

ThreeTen Backport allows you to use ZonedDateTime in Java 7

You can, and you may prefer to use ZonedDateTime in Java 7 too rather than XMLGregorianCalendar. This use goes through ThreeTen Backport, the backport of java.time to Java 6 and 7, see the links at the bottom.

import org.threeten.bp.ZonedDateTime;

public class DemoZonedDateTimeInJava7 {

    public static void main(String[] args) {
        String receivedDateTimeString = "2020-04-13T12:36:13Z";
        ZonedDateTime zdt = ZonedDateTime.parse(receivedDateTimeString);
        System.out.println(zdt);
    }

}

2020-04-13T12:36:13Z

  • In Java 8 and later and on newer Android devices (from API level 26) the modern API comes built-in.
  • In non-Android Java 6 and 7 get the ThreeTen Backport, the backport of the modern classes (ThreeTen for JSR 310; see the links at the bottom).
  • On (older) Android use the Android edition of ThreeTen Backport. It’s called ThreeTenABP. And make sure you import the date and time classes from org.threeten.bp with subpackages.

Links

Ole V.V.
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