public class WriteXMLFile { public static void main(String argv[]) { try { DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance(); DocumentBuilder docBuilder = docFactory.newDocumentBuilder(); // root elements Document doc = docBuilder.newDocument(); Element rootElement = doc.createElement("heroes_data"); doc.appendChild(rootElement); // staff elements Element staff = doc.createElement("hero"); rootElement.appendChild(staff); // set attribute to staff element //Attr attr = doc.createAttribute("id"); //attr.setValue("1"); //staff.setAttributeNode(attr); // shorten way // staff.setAttribute("id", "1"); // firstname elements Element firstname = doc.createElement("firstname"); firstname.appendChild(doc.createTextNode("artem")); staff.appendChild(firstname); // age elements Element salary = doc.createElement("age"); salary.appendChild(doc.createTextNode("18")); staff.appendChild(salary); // write the content into xml file TransformerFactory transformerFactory = TransformerFactory.newInstance(); Transformer transformer = transformerFactory.newTransformer(); DOMSource source = new DOMSource(doc); //StreamResult result = new StreamResult(new File("C:\\file.xml")); // Output to console for testing StringWriter writer = new StringWriter(); StreamResult result = new StreamResult(writer); transformer.transform(source, result); String strResult = writer.toString(); FileOutputStream out=new FileOutputStream("base"); BufferedOutputStream bos = new BufferedOutputStream(out); // перевод строки в байты byte[] buffer = strResult.getBytes(); bos.write(buffer, 0, buffer.length); out.close(); System.out.println(strResult); } catch (ParserConfigurationException pce) { pce.printStackTrace(); } catch (TransformerException tfe) { tfe.printStackTrace(); } catch (IOException ex) { ex.printStackTrace(); //System.out.println(ex.getMessage()); } } }
  • Perhaps because you do not close it. - Sergey Gornostaev

1 answer 1

For BufferedOutputStream you must call the flush() method in order to write to the disk

If you add the line bos.flush(); between byte[] buffer = strResult.getBytes(); and out.close();

then the data in the file will appear ...

Complete code:

 public class WriteXMLFile { public static void main(String argv[]) { try { DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance(); DocumentBuilder docBuilder = docFactory.newDocumentBuilder(); // root elements Document doc = docBuilder.newDocument(); Element rootElement = doc.createElement("heroes_data"); doc.appendChild(rootElement); // staff elements Element staff = doc.createElement("hero"); rootElement.appendChild(staff); // set attribute to staff element //Attr attr = doc.createAttribute("id"); //attr.setValue("1"); //staff.setAttributeNode(attr); // shorten way // staff.setAttribute("id", "1"); // firstname elements Element firstname = doc.createElement("firstname"); firstname.appendChild(doc.createTextNode("artem")); staff.appendChild(firstname); // age elements Element salary = doc.createElement("age"); salary.appendChild(doc.createTextNode("18")); staff.appendChild(salary); // write the content into xml file TransformerFactory transformerFactory = TransformerFactory.newInstance(); Transformer transformer = transformerFactory.newTransformer(); DOMSource source = new DOMSource(doc); //StreamResult result = new StreamResult(new File("C:\\file.xml")); // Output to console for testing StringWriter writer = new StringWriter(); StreamResult result = new StreamResult(writer); transformer.transform(source, result); String strResult = writer.toString(); FileOutputStream out=new FileOutputStream("base"); BufferedOutputStream bos = new BufferedOutputStream(out); // перевод строки в байты byte[] buffer = strResult.getBytes(); bos.write(buffer, 0, buffer.length); bos.flush(); out.close(); System.out.println(strResult); } catch (ParserConfigurationException pce) { pce.printStackTrace(); } catch (TransformerException tfe) { tfe.printStackTrace(); } catch (IOException ex) { ex.printStackTrace(); //System.out.println(ex.getMessage()); } } }