spring-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:oxm="http://www.springframework.org/schema/oxm"
       xsi:schemaLocation="http://www.springframework.org/schema/beans 
       http://www.springframework.org/schema/beans/spring-beans.xsd   
       http://www.springframework.org/schema/oxm 
       http://www.springframework.org/schema/oxm/spring-oxm.xsd">

    <oxm:jaxb2-marshaller id="marshaller">
        <oxm:class-to-be-bound name="com.za.jaxb.widget.WidgetConfig" />
        <oxm:class-to-be-bound name="com.za.jaxb.widget.WidgetResourceRef" />
    </oxm:jaxb2-marshaller>

</beans>