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Reader reader = new StringReader(XXX.xml);     InputSource is = new InputSource(reader);     DocumentBuilderFactory factory =  DocumentBuilderFactory.newInstance();     DocumentBuilder builder = factory.newDocumentBuilder();     SAXBuilder build = new SAXBuilder();     Document   doc = build.build(is);     Element root=doc.getRootElement();     java.util.List
   
     list = root.getChildren("attribute");     Element rootelem=null;     for (Element elem :list) {     String name = elem.getAttributeValue("displayname");      String value = elem.getValue();      String before = elem.getChildText("before");     oldvalue.put(name, before);      if (before !=null) {     String str = value.replace(before, "");      newvalue.put(name, str);      } else {       newvalue.put(name, value);         }              }
   

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