toString method of XMLGregorianCalendar does not return a valid dateTime value.
The output contains an exponent notation in millisecond value.

The following sample will create an XMLGregorianCalendar from
2006-10-23T22:15:01.0000001+08:00, but toString will print a different and an
invalid dateTime which is 2006-10-23T22:15:01E-7+08:00


package org.gs1us.xml.test;

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

/**
 * @author nalmodiel
 */
public class XMLGregorianCalendarSample {

  public static void main(String[] args) {

    try {
String inputDateTime = "2006-10-23T22:15:01.0000001+08:00";
DatatypeFactory factory = DatatypeFactory.newInstance();
XMLGregorianCalendar calendar =
factory.newXMLGregorianCalendar(inputDateTime);

System.out.println(calendar.toString());
    }
    catch (Exception e) {
e.printStackTrace();
    }
  }
}