import org.jdom.Document;
import org.jdom.Element;
import org.jdom.input.SAXBuilder;

public class JDOMTest
{
    public static void main(String[] args) throws Exception
    {
        Document document = new SAXBuilder().build("xml.xml");
        Element rootEle = document.getRootElement();
        String cEle = rootEle.getChildText("c");
        String gEle = rootEle.getChild("userinfo").getChildText("g");
    }
}