Dynamic tag names with JAXB

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You can use an @XmlAnyElement-annotated property and return the elements as JAXBElements:

private Map<String, Integer> months = ...;

@XmlAnyElement
public List<JAXBElement<Integer>> getMonths() {
    List<JAXBElement<Integer>> elements = new ArrayList<JAXBElement<Integer>>();
    for (Map.Entry<String, Integer> month: months.entrySet()) 
        elements.add(new JAXBElement(new QName(month.getKey()), 
                                     Integer.class, month.getValue()));
    return elements;
}

This approach is ugly, but not uglier than the XML it produces.

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