在向其添加节点后,如何立即更新XML文档?
所以我正在创建一个日历程序,当你向它添加一个新条目时我需要它来更新。 现在,我需要点击xml文件让它更新,然后其他一切正常。
宣言:
private DocumentBuilderFactory documentFactory; private DocumentBuilder documentBuilder; private Document xmlDoc; private Node rootNode; private static Node dataNode;
构造函数中的赋值:
try { documentFactory = DocumentBuilderFactory.newInstance(); documentBuilder = documentFactory.newDocumentBuilder(); xmlDoc = documentBuilder.parse(Main.class.getResourceAsStream("Calendar.xml")); rootNode = xmlDoc.getDocumentElement(); dataNode = rootNode.getChildNodes().item(0); } catch(ParserConfigurationException | SAXException | IOException e) {e.printStackTrace(System.out);}
按下按钮后,节点被创建并添加到dataNode
,然后文件更新如下:
try { OutputFormat outFormat = new OutputFormat(xmlDoc); try (FileOutputStream outStream = new FileOutputStream("src/virtualagenda/Calendar.xml")) { XMLSerializer serializer = new XMLSerializer(outStream, outFormat); serializer.serialize(xmlDoc); outStream.flush(); outStream.close(); } }catch(IOException e) {e.printStackTrace(System.out);}
您应该创建一些子流程,而不是在构造函数中加载文档
- 将XML从文件加载到
Document
- 给定
Document
参数,创建/更新GUI