dom4j

PrintWriter pWriter = response.getWriter();  
  
        Document document = DocumentHelper.createDocument();  
        Element root = document.addElement("person");  
        root.addElement("name").addText("张三");  
        root.addElement("age").addText("20");  
  
        XMLWriter xmlWriter = new XMLWriter(pWriter);  
        xmlWriter.write(document);