如何从XML java的标签内部获取图像的链接

Question

我正在尝试读取XML文件，并将标签之间的值存储为String。但是对于一个标签<picture url="https://cloudstor.aarnet.edu.au/plus/s/62e0uExNviPanZE/download"/> 我需要获取图像的URL并存储它，以便将来使用。

我用过

File stocks = new File("gui.xml");
        DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
        dbFactory.setIgnoringElementContentWhitespace(true);
        DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
        Document doc = dBuilder.parse(stocks);
        doc.getDocumentElement().normalize();
        System.out.println("root of xml file" + doc.getDocumentElement().getNodeName());
        NodeList nodes = doc.getElementsByTagName("billboard");
        System.out.println("==========================");
        Node node = nodes.item(0);
        if (node.getNodeType() == Node.ELEMENT_NODE) {
            Element element = (Element) node;
             //message = getValue("message", element);
             information = getValue("information", element).trim();
            String picture = getValue("picture url=", element);
        } 
private static String getValue(String tag, Element element) {
    NodeList nodes = element.getElementsByTagName(tag).item(0).getChildNodes();
    Node node = (Node) nodes.item(0);
    return node.getNodeValue();
}

这将有助于从普通标签中获取信息，例如此处的信息标签。知道如何使它适用于图片标签。

<billboard class="nodarken">

              <information>
                     Billboard with an information tag and nothing else. Note that the text is word-wrapped. The quick brown fox jumped over the lazy dogs.
              </information>
              <picture url="https://cloudstor.aarnet.edu.au/plus/s/62e0uExNviPanZE/download"/>

       </billboard>

Answer 1

<billboard class="nodarken">

              <information>
                     Billboard with an information tag and nothing else. Note that the text is word-wrapped. The quick brown fox jumped over the lazy dogs.
              </information>
              <picture><![CDATA[ https://cloudstor.aarnet.edu.au/plus/s/62e0uExNviPanZE/download"]]></picture>


       </billboard>