java读取xml文件的节点信息

public String getURL(String xml) throws DocumentException{
Element root = DocumentHelper.parseText(xml.toString()).getRootElement();
System.out.println(root.getName());
String URL=root.attributeValue("form");
return URL;
}

public List<Element> getActivityNames(String xml) throws DocumentException{
Element root = DocumentHelper.parseText(xml.toString()).getRootElement();
List<Element> elements=root.elements();
List<Element> list=new ArrayList<Element>();
for(Element elem:elements){
if("task".equals(elem.getName())){
list.add(elem);
}
}
return list;
}