Java tutorial
import java.io.File; import javax.xml.bind.JAXBContext; import javax.xml.bind.Marshaller; import javax.xml.bind.Unmarshaller; import javax.xml.bind.annotation.XmlAttribute; import javax.xml.bind.annotation.XmlRootElement; import javax.xml.bind.annotation.adapters.XmlAdapter; import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter; public class Main { public static void main(String[] args) throws Exception { JAXBContext jc = JAXBContext.newInstance(Root.class); Unmarshaller unmarshaller = jc.createUnmarshaller(); Root root = (Root) unmarshaller.unmarshal(new File("input.xml")); Marshaller marshaller = jc.createMarshaller(); marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true); marshaller.marshal(root, System.out); } @XmlRootElement public static class Root { @XmlAttribute @XmlJavaTypeAdapter(BooleanAdapter.class) private Boolean a; public boolean isA() { return a; } public void setA(String s) { this.a = "yes".equals(s) || "on".equals(s) || "in".equals(s); } } public static class BooleanAdapter extends XmlAdapter<String, Boolean> { @Override public Boolean unmarshal(String s) throws Exception { return "yes".equals(s) || "on".equals(s) || "in".equals(s); } @Override public String marshal(Boolean b) throws Exception { if (b) { return "yes"; } return "no"; } } }