import org.codehaus.jettison.json.JSONException; import org.codehaus.jettison.json.JSONObject; import org.codehaus.jettison.mapped.Configuration; import org.codehaus.jettison.mapped.MappedNamespaceConvention; import org.codehaus.jettison.mapped.MappedXMLStreamWriter; import javax.xml.stream.XMLStreamException; import java.io.StringWriter; public class JettisonExample { public static void main(String[] args) throws JSONException, XMLStreamException { JSONObject jsonObject = new JSONObject(json); String name = jsonObject.getString("name"); int age = jsonObject.getInt("age"); JSONObject jsonObj = new JSONObject(person, new Configuration()); StringWriter writer = new StringWriter(); MappedXMLStreamWriter xmlStreamWriter = new MappedXMLStreamWriter(new MappedNamespaceConvention(new Configuration()), writer); jsonObj.write(xmlStreamWriter); String jsonStr = writer.toString(); System.out.println(jsonStr); } private static class Person { private String name; private int age; public Person(String name, int age) { this.name = name; this.age = age; } // getters and setters } }