http://www.avajava.com/tutorials/lessons/how-do-i-convert-a-javabean-to-an-xml-string-using-xmlencoder.html

XmlEncodeToString.java

package example;

import java.beans.XMLEncoder;
import java.io.ByteArrayOutputStream;
import java.util.Vector;

public class XmlEncodeToString {

  public static void main(String[] args) throws Exception {

		MyBean mb = new MyBean();
		mb.setMyBoolean(true);
		mb.setMyString("xml is cool");
		Vector<String> v = new Vector<String>();
		v.add("one");
		v.add("two");
		v.add("three");
		mb.setMyVector(v);

		ByteArrayOutputStream baos = new ByteArrayOutputStream();
		XMLEncoder xmlEncoder = new XMLEncoder(baos);
		xmlEncoder.writeObject(mb);
		xmlEncoder.close();

		String xml = baos.toString();
		System.out.println(xml);
	}
}