Java 8 – How to convert ZonedDateTime to XMLGregorianCalendar and vice-versa ?

August 14, 2022 SJ Java 8, Java 8 Date/Time 0

In this article, we will learn how to convert ZonedDateTime to XMLGregorianCalendar in Java 1.8 version and vice-versa

1. Convert ZonedDateTime to XMLGregorianCalendar :

  • For conversion of ZonedDateTime to XMLGregorianCalendar use DatatypeFactory
  • DatatypeFactory.newInstance().newXMLGregorianCalendar(GregorianCalendar) returns XMLGregorianCalendar object
    • First, convert ZonedDateTime to GregorianCalendar using GregorianCalendar.from() method which returns GregorianCalendar
    • Pass converted GregorianCalendar to DatatypeFactory.newInstance().newXMLGregorianCalendar() method which returns XMLGregorianCalendar
  • In short, ZonedDateTime -> GregorianCalendar -> XMLGregorianCalendar
  • Lets see an example for conversion of ZonedDateTime to XMLGregorianCalendar in the below illustration

ConvertZonedDateTimeToXmlGregorianCalendar.java

package in.bench.resources.java8.zoneddatetime.examples;

import java.time.ZonedDateTime;
import java.time.ZoneId;
import java.util.GregorianCalendar;

import javax.xml.datatype.DatatypeConfigurationException;
import javax.xml.datatype.DatatypeFactory;
import javax.xml.datatype.XMLGregorianCalendar;

public class ConvertZonedDateTimeToXmlGregorianCalendar {

	public static void main(String[] args) throws DatatypeConfigurationException {

		// 1. get Zoned date/time
		ZonedDateTime zonedDateTime = ZonedDateTime.now();
		System.out.println("Zoned Date/time is :- \n" + zonedDateTime);


		// 2. get system default zone
		ZoneId zoneId = ZoneId.systemDefault();
		System.out.println("\nDefault System Zone is :- \n" 
				+ zoneId);


		// 3. convert ZonedDateTime -> GregorianCalendar 
		GregorianCalendar gregorianCalendar = GregorianCalendar.from(zonedDateTime);
		System.out.println("\nGregorianCalendar is :- \n" 
				+ gregorianCalendar.getTime());


		// 4. convert GregorianCalendar to XMLGregorianCalendar
		XMLGregorianCalendar xmlGregorianCalendar = DatatypeFactory
				.newInstance()
				.newXMLGregorianCalendar(
						gregorianCalendar
						);


		// 5. print to console
		System.out.print("\nConversion of ZonedDateTime to XMLGregorianCalendar is :- \n"
				+ xmlGregorianCalendar);
	}
}

Output:

Zoned Date/time is :- 
2022-08-13T17:36:21.505137700+05:30[Asia/Calcutta]

Default System Zone is :- 
Asia/Calcutta

GregorianCalendar is :- 
Sat Aug 13 17:36:21 IST 2022

Conversion of ZonedDateTime to XMLGregorianCalendar is :- 
2022-08-13T17:36:21.505+05:30

2. Convert XMLGregorianCalendar to ZonedDateTime :

  • First, create XMLGregorianCalendar object using DatatypeFactory.newInstance().newXMLGregorianCalendar(String) method
  • For conversion of XMLGregorianCalendar to ZonedDateTime,
    • First, convert XMLGregorianCalendar to GregorianCalendar using toGregorianCalendar() method
    • And then invoke toZonedDateTime() method to convert GregorianCalendar to ZonedDateTime in (yyyy-MM-ddTHH:mm:ss.nnn+HH:mm[GMT+HH:mm]) format without zone information
  • In short, XMLGregorianCalendar -> GregorianCalendar -> ZonedDateTime
  • Note: for XMLGregorianCalendar to ZonedDateTime conversion with zone information use ZonedDateTime.of() method and pass LocalDateTime & ZoneId as input-arguments
  • Lets see an example for conversion of XMLGregorianCalendar to ZonedDateTime in the below illustration

ConvertXmlGregorianCalendarToZonedDateTime.java

package in.bench.resources.java8.zoneddatetime.examples;

import java.time.ZoneId;
import java.time.ZonedDateTime;

import javax.xml.datatype.DatatypeConfigurationException;
import javax.xml.datatype.DatatypeFactory;
import javax.xml.datatype.XMLGregorianCalendar;

public class ConvertXmlGregorianCalendarToZonedDateTime {

	public static void main(String[] args) throws DatatypeConfigurationException {

		// 1. get new instance of XMLGregorianCalendar
		XMLGregorianCalendar xmlGregorianCalendar = DatatypeFactory
				.newInstance()
				.newXMLGregorianCalendar(
						"2022-12-23T18:28:34.438+05:30"
						);
		System.out.println("XMLGregorianCalendar/Date is :- \n" 
				+ xmlGregorianCalendar);


		// 2. convert XMLGregorianCalendar to ZonedDateTime 1
		ZonedDateTime zonedDateTime = xmlGregorianCalendar
				.toGregorianCalendar() // GregorianCalendar
				.toZonedDateTime(); // ZonedDateTime


		// 2.1 print to console
		System.out.println("\nConversion of XMLGregorianCalendar to ZonedDateTime[Offset] is :- \n"
				+ zonedDateTime);


		// 3. convert XMLGregorianCalendar to ZonedDateTime 2
		ZonedDateTime zonedDateTime2 = ZonedDateTime.of(
				zonedDateTime.toLocalDateTime(), // LocalDateTime
				ZoneId.systemDefault() // ZoneId
				);


		// 3.1 print to console
		System.out.print("\nConversion of XMLGregorianCalendar to ZonedDateTime[Zone] is :- \n"
				+ zonedDateTime2);
	}
}

Output:

XMLGregorianCalendar/Date is :- 
2022-12-23T18:28:34.438+05:30

Conversion of XMLGregorianCalendar to ZonedDateTime[Offset] is :- 
2022-12-23T18:28:34.438+05:30[GMT+05:30]

Conversion of XMLGregorianCalendar to ZonedDateTime[Zone] is :- 
2022-12-23T18:28:34.438+05:30[Asia/Calcutta]

Related Articles:

References:

Happy Coding !!
Happy Learning !!

Java 8 – How to convert java.util.Date to ZonedDateTime in different ways ?
Java 8 – How to convert ZonedDateTime to GregorianCalendar and vice-versa ?

Related posts:

  1. Java 8 – How to convert LocalDateTime to XMLGregorianCalendar and vice-versa ?
  2. Java 8 – How to convert ZonedDateTime to GregorianCalendar and vice-versa ?
  3. Java 8 – How to convert ZonedDateTime to java.util.Date and vice-versa ?
  4. Java 8 – How to convert ZonedDateTime to Calendar and vice-versa ?