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

Question

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

Meet an exception when unmarshalling from xml

Answer 1

I had the same problem.. It helped me, I'm specify the same field names of my classes as the tag names in the xml file (the file comes from an external system).

For example:

My xml file:

  
     
        1
        Some name 1
        Some code
        Some Url
        
           
              2
              Some name 2
           
        
     
  

My Response class:

@XmlRootElement(name="Response")
@XmlAccessorType(XmlAccessType.FIELD)
public class Response {
    @XmlElement
    private ESList[] ESList = new ESList[1]; // as the tag name in the xml file..

    // getter and setter here
}

My ESList class:

@XmlAccessorType(XmlAccessType.FIELD)
@XmlRootElement(name="ESList")
public class ESList {
    @XmlElement
    private Item[] Item = new Item[1]; // as the tag name in the xml file..

    // getters and setters here
}

My Item class:

@XmlRootElement(name="Item")
@XmlAccessorType(XmlAccessType.FIELD)
public class Item {
    @XmlElement
    private String ID; // as the tag name in the xml file..
    @XmlElement
    private String Name; // and so on...
    @XmlElement
    private String Code;
    @XmlElement
    private String Url;
    @XmlElement
    private RegionList[] RegionList = new RegionList[1];

    // getters and setters here
}

My RegionList class:

@XmlRootElement(name="RegionList")
@XmlAccessorType(XmlAccessType.FIELD)
public class RegionList {
    Item[] Item = new Item[1];

    // getters and setters here
}

My DemoUnmarshalling class:

public class DemoUnmarshalling {
    public static void main(String[] args) {
        try {
            File file = new File("...");

            JAXBContext jaxbContext = JAXBContext.newInstance(Response.class);
            Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();
            jaxbUnmarshaller.setEventHandler(
                new ValidationEventHandler() {
                    public boolean handleEvent(ValidationEvent event ) {
                        throw new RuntimeException(event.getMessage(),
                            event.getLinkedException());
                    }
                }
            );

            Response response = (Response) jaxbUnmarshaller.unmarshal(file);

            ESList[] esList = response.getESList();
            Item[] item = esList[0].getItem();
            RegionList[] regionLists = item[0].getRegionList();
            Item[] regionListItem = regionLists[0].getItem();

            System.out.println(item[0].getID());
            System.out.println(item[0].getName());
            System.out.println(item[0].getCode());
            System.out.println(item[0].getUrl());
            System.out.println(regionListItem[0].getID());
            System.out.println(regionListItem[0].getName());

        } catch (JAXBException e) {
            e.printStackTrace();
        }
    }
}

It gives:

1
Some name 1
Some code
Some Url
2
Some name 2