JDOM操作xml文件

import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import org.apache.xpath.XPath;
import org.jaxen.JaxenException;
import org.jdom.input.SAXBuilder;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;

public class GlobalConfigure {

 private static GlobalConfigure instance=new GlobalConfigure();
 
 private Element rootElt;
 
 private GlobalConfigure() throws IOException
 {
  SAXBuilder sb=new SAXBuilder();
        try {
   Document doc=sb.build(Thread.currentThread().getContextClassLoader()
     .getResourceAsStream("global-configure.xml"));
            //得到元素根节点
   this.rootElt=doc.getDocumentElement();
   //得到子节点
            //NodeList nodlist=rootElt.getChildNodes();
            initJdbcInfo();
        } catch (Exception e) {
   e.printStackTrace();
  }
 }
 
 public static GlobalConfigure getInstance()
 {
  return instance;
 }
 
 private void initJdbcInfo()
 {
  try {
   Element element = XPath.selectSingleNode(rootElt,
     "//sys-configure/jdbc-info/driver-class-name");
      //System.out.println(element.getTextContent());
  } catch (JaxenException e) {
   e.printStackTrace();
  }   
 }
 
 private void initBean()
 {
  List beanList=XPath.selectNodes(rootElt,"//sys-configure/beans");
  for(Iterator iter=beanList.iterator();iter.hasNext();)
  {
   Element beanElt=(Element)iter.next();
   String id=beanElt.getAttribute("id");
      String className=beanElt.getAttribute("class");
      //System.out.println("id="+id);
      //System.out.println("name="+className);
      Object obj=Class.forName(className).newInstance();
      Map beanMap=new HashMap();
      beanMap.put(id, className);
  }
 }
 
 public static void main(String args[])
 {
  GlobalConfigure.getInstance();
 }
}