java如何用dom解析xml以及获得根元素下的值

SAXBuilder dcment=new SAXBuilder();
   Document doc = (Document) dcment.build(new File(filePath));  
   Element element = (Element) doc.getRootElement();
   element = element.getChild("dict");
   element = element.getChild(nodePath);
   if(element==null){
    System.out.println("dict."+nodePath+" not find");
    return "";
   } 
   List list = element.getChildren();
   for(int i=0;i<list.size();i++){
    Element node = (Element)list.get(i);
    String dict = node.getAttribute("dictid").getValue();//获得根元素里的内容     node.getValue();是直接获得该节点下的内容
    String interfacecode = node.getAttribute("interfacecode").getValue();
    if(interfacecode.equals(code))
     return dict;
   }
   return "";