title: In JAXB, how to use @XmlJavaTypeAdapters annotation?
body: <p>I want to change "javax.xml.datatype.XMLGregorianCalendar" to "java.util.Date" when unmarshalling from xml to Java class of JAXB.</p>
  
  <p>But I don't put any annotations of @XmlJavaTypeAdapter in Java classes.</p>
  
  <p>So, I'm going to try to use an annotation of @XmlJavaTypeAdapters, but I don't know how to use it...</p>
  
  <p>Please show me examples for using it.</p>