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javax.xml.bind.UnmarshalException: unexpected element (uri:””, local:”Group”)

unexpected element (uri:"", local:"Group"). Expected elements are <{}group>

Meet an exception when unmarshalling from xml

JAXBContext jc = JAXBContext.newInstance(Group.class); 
Unmarshaller unmarshaller = jc.createUnmarshaller();
Group group = (User)unmarshaller.unmarshal(new File("group.xml"));

Group class has no any annotation and group.xml just contains data.

Anything can be the cause?

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Answer

It looks like your XML document has the root element “Group” instead of “group”. You can:

  1. Change the root element on your XML to be “group”
  2. Add the annotation @XmlRootElement(name=”Group”) to the Group classs.
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