i have an String like:
String msg= <?xml version="1.0" encoding="UTF-8" standalone="no"> <validateEmail> <emailid>[email protected]</emailid> <instanceid>instance1</instanceid> <msgname>validatemsg</msgname> <taskid>task1</taskid> </validateEmail> how i am able to convert this string into an xml file and append a new node.
Thanks
This code converts your String into an XML document, adds a new node, then prints it out as a String so you can check that it looks correct.
public void xml() throws ParserConfigurationException, SAXException, IOException { String msg = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>"; msg += "<validateEmail><emailid>[email protected]</emailid><instanceid>instance1</instanceid>"; msg += "<msgname>validatemsg</msgname><taskid>task1</taskid></validateEmail>"; DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); DocumentBuilder builder = factory.newDocumentBuilder(); Document doc = builder.parse(new ByteArrayInputStream(msg.getBytes())); Node newNode = doc.createElement("newnode"); newNode.setTextContent("value"); Node root = doc.getFirstChild(); root.appendChild(newNode); try { DOMSource domSource = new DOMSource(doc); StringWriter writer = new StringWriter(); StreamResult result = new StreamResult(writer); TransformerFactory tf = TransformerFactory.newInstance(); Transformer transformer = tf.newTransformer(); transformer.transform(domSource, result); System.out.println(writer.toString()); } catch (TransformerException ex) { ex.printStackTrace(); } } Firstly create a DOM (document object model) object representing your XML.
byte[] xmlBytes = msg.getBytes("UTF-8"); DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); DocumentBuilder db = dbf.newDocumentBuilder(); Document doc = db.parse(new ByteArrayInputStream(xmlBytes)); Then you need to add your new node to it:
Element newNode = doc.createElement("myNode"); newNode.setTextContent("contents of node"); Element root = doc.getDocumentElement(); // the <validateEmail> root.appendChild(newNode); Then you want to write it to the filesystem, if I understand the question correctly.
File outputFile = ...; Source source = new DOMSource(doc); Result result = new StreamResult(outputFile); Transformer xformer = TransformerFactory.newInstance().newTransformer(); xformer.transform(source, result); 