java.lang.NoClassDefFoundError: org/apache/xerces/jaxp/datatype/XMLGregorianCalendarImpl$Parser

When you encounter the following error that related to web service. java.lang.NoClassDefFoundError: org/apache/xerces/jaxp/datatype/XMLGregorianCalendarImpl$Parser

Solution 1:
Ensure no xercesImpl.jar in your classpath since the implementation of xerce is built-in wiht JAVA SE 1.6.

Solution 2:
Use XmlJavaTypeAdapter [ @XmlJavaTypeAdapter(JaxbDateAdapter.class)] to convert XMLGregorianCalendar type to Date type. XMLGregorianCalendar is the built-in Java data type for JAXB mapping with datetime.

Example:

Binding.xjb
<?xml version="1.0" encoding="UTF-8"?>

<bindings xmlns="http://java.sun.com/xml/ns/jaxb"

                xmlns:xsi="http://www.w3.org/2000/10/XMLSchema-instance"

                xmlns:xjc="http://java.sun.com/xml/ns/jaxb/xjc"

                xmlns:xsd="http://www.w3.org/2001/XMLSchema"

                xsi:schemaLocation="

http://java.sun.com/xml/ns/jaxb http://java.sun.com/xml/ns/jaxb/bindingschema_2_0.xsd"

    version="2.1">

    <globalBindings>

         <javaType name="java.util.Date" xmlType="xsd:dateTime"

                parseMethod="DateConverter.parseDate"

                printMethod="DateConverter.printDate" />

        <serializable uid="100" />

    </globalBindings>

</bindings>


JaxbDateAdapter.java:
public class JaxbDateAdapte extends XmlAdapter
{

    public Date unmarshal(String value) {
        return (JaxbConverter .parseDate(value));
    }

    public String marshal(Date value) {
        return (JaxbConverter .printDate(value));
    }

}

JaxbConverter .java:
 public class JaxbConverter {
    public JaxbConverter() {
    }
  
    public static Date parseDate(String value){
      
        XMLGregorianCalendar xmlCalendar = null;
        Date date = null;
        try {
            xmlCalendar = DatatypeFactory.newInstance().newXMLGregorianCalendar(value);
            GregorianCalendar calendar = xmlCalendar.toGregorianCalendar();
            date = calendar.getTime();
          
        } catch (DatatypeConfigurationException e) {
            e.printStackTrace();
            date = new Date();
        }
        return date;
      
    }
  
    public static String printDate(Date value){
      
        XMLGregorianCalendar xmlCalendar = null;
        GregorianCalendar calendar = null;
  

        try {
            calendar = new GregorianCalendar();
            calendar.setTimeInMillis(value.getTime());
            xmlCalendar = DatatypeFactory.newInstance().newXMLGregorianCalendar(calendar);
        } catch (DatatypeConfigurationException e) {
             e.printStackTrace();
        }
        return xmlCalendar.toXMLFormat();
      
    }
}

Jaxb Class:
@XmlElement(type = String.class)
@XmlJavaTypeAdapter(JaxbDateAdapter.class)
@XmlSchemaType(name = "dateTime")
protected Date scheduledDatetime;