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

August 10, 2022 SJ Java 8, Java 8 Date/Time 0

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

1. Convert LocalDateTime to XMLGregorianCalendar :

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

ConvertLocalDateTimeToXmlGregorianCalendar.java

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

import java.time.LocalDateTime;
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 ConvertLocalDateTimeToXmlGregorianCalendar {

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

		// 1. get current system date/time
		LocalDateTime localDateTime = LocalDateTime.now();
		System.out.println("Current system Date/time is :- \n" + localDateTime);


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


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


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


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

Output:

Current system Date/time is :- 
2022-08-09T18:32:58.871957400

Default System Zone is :- 
Asia/Calcutta

GregorianCalendar is :- 
Tue Aug 09 18:32:58 IST 2022

Conversion of LocalDateTime to XMLGregorianCalendar is :- 
2022-08-09T18:32:58.871+05:30

2. Convert XMLGregorianCalendar to LocalDateTime :

  • First, create XMLGregorianCalendar object using DatatypeFactory.newInstance().newXMLGregorianCalendar(String) method
  • For conversion of XMLGregorianCalendar to LocalDateTime,
    • First, convert XMLGregorianCalendar to GregorianCalendar using toGregorianCalendar() method
    • And then invoke toZonedDateTime() method to convert GregorianCalendar to ZonedDateTime
    • And then invoke toLocalDateTime() method to convert ZonedDateTime to LocalDateTime
  • In short, XMLGregorianCalendar -> GregorianCalendar -> ZonedDateTime -> LocalDateTime
  • Lets see an example for conversion of XMLGregorianCalendar to LocalDateTime in the below illustration

ConvertXmlGregorianCalendarToLocalDateTime.java

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

import java.time.LocalDateTime;

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

public class ConvertXmlGregorianCalendarToLocalDateTime {

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

		// 1. get new instance of XMLGregorianCalendar
		XMLGregorianCalendar xmlGregorianCalendar = DatatypeFactory
				.newInstance()
				.newXMLGregorianCalendar(
						"2022-08-09T18:28:34.038+05:30"
						);
		System.out.println("XMLGregorianCalendar/Date is :- \n" + xmlGregorianCalendar);


		// 2. convert XMLGregorian	Calendar to LocalDateTime
		LocalDateTime localDateTime = xmlGregorianCalendar
				.toGregorianCalendar()
				.toZonedDateTime()
				.toLocalDateTime();


		// 3. print to console
		System.out.print("\nConversion of XMLGregorianCalendar to LocalDateTime is :- \n"
				+ localDateTime);

	}
}

Output:

XMLGregorianCalendar/Date is :- 
2022-08-09T18:28:34.038+05:30

Conversion of XMLGregorianCalendar to LocalDateTime is :- 
2022-08-09T18:28:34.038

Related Articles:

References:

Happy Coding !!
Happy Learning !!

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

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