XStream

http://xstream.codehaus.org/
http://www.ibm.com/developerworks/xml/library/x-xstream/
Library of serializing object to XML and deserializing object back from XML
1) Example of converting a list of object into a XML file:

public boolean XStream2XML(List importEntryList, String strOutXMLFilePath) 
{
  XStream xs = new XStream();

  //by default, xstream will use class's full name
  //you could use alias to avoid that
  xs.alias("entryList", List.class);
  xs.alias("importentry", ImportEntry.class);
  xs.alias("attribute", Attribute.class);

  try 
  {
    FileOutputStream fs = new FileOutputStream(strOutXMLFilePath);
    xs.toXML(importEntryList, fs);
    //a simpler version
    //String xml = xs.toXML(importEntryList);
    fs.close();
  } 
  catch (Exception e1) 
  {
    //e1.printStackTrace();
    return false;
  }

  return true;
}

2) Example of converting XML back to Java Object

String xml = "......";
Person newJoe = (Person)xstream.fromXML(xml);