Question

我设法以我想要的方式写入xml文件，但它只会在程序退出后更新文件。我希望在按下按钮后立即更新文件。

以下是我正在使用的代码。它在单击JButton时运行。

    try {
        documentFactory = DocumentBuilderFactory.newInstance();
        documentBuilder = documentFactory.newDocumentBuilder();
        xmlDoc = documentBuilder.parse(Reminders.class.getResourceAsStream("Reminders.xml"));
    } catch(ParserConfigurationException | SAXException | IOException e) {
        e.printStackTrace();
    }

    Node rNode = xmlDoc.getChildNodes().item(0);
    Node remindersNode = xmlDoc.getElementsByTagName("reminders").item(0);
    Node newReminder = xmlDoc.createElement("r" + remindersNode.getChildNodes().getLength()/2);

    // Elements are created and put together
    // Redacted because they take up too much space

    OutputFormat outFormat = new OutputFormat(xmlDoc);
    outFormat.setIndenting(true);

    try {
        FileOutputStream outStream = new FileOutputStream("src/virtualagenda/Reminders.xml");
        XMLSerializer serializer = new XMLSerializer(outStream, outFormat);
        serializer.serialize(xmlDoc);

        outStream.flush();
        outStream.close();

    }catch(IOException e) {e.printStackTrace();}

Answer 1

您必须清空FileOutputStream。

FileOutputStream outStream = new FileOutputStream("src/virtualagenda/Reminders.xml");
XMLSerializer serializer = new XMLSerializer(outStream, outFormat);
serializer.serialize(xmlDoc);
outStream.flush()

或者如果您已完成流，只需使用outStream.close()

关闭它

Answer 2

怎么样：

outStream.flush();
outStream.close();

迫使写作？

如何在程序运行时写入xml文件？

2 个答案: