java - 如何使用 DOM 获取 ElementById？

Question

我有下面给出的 HTML 页面的一部分，我想使用 DOM 解析器提取其 id 为 hiddenDivHL 的 div 标签的内容:

HTML 页面的一部分:

<div id='hiddenDivHL' style='display:none'>http://74.127.61.106/udayavaniIpad/details.php?home=0&catid=882&newsid=123069[InnerSep]http://www.udayavani.com/udayavani_cms/gall_content/2012/1/2012_1$thumbimg117_Jan_2012_000221787.jpg[InnerSep]ಯುವಜನತೆಯಿಂದ ಭವ್ಯಭಾರತ[OuterSep]

到目前为止，我已经使用了下面的代码，但我无法使用 getElementById。该怎么做？

DOM 解析器:

    try {

        URL url = new URL("http://74.127.61.106/udayavaniIpad/details_android.php?home=1&catid=882&newsid=27593");
        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        DocumentBuilder db = dbf.newDocumentBuilder();
        Document doc = db.parse(new InputSource(url.openStream()));
        doc.getDocumentElement().normalize();

        NodeList nodeList = doc.getElementsByTagName("item");

        /** Assign textview array lenght by arraylist size */
        name = new TextView[nodeList.getLength()];
        website = new TextView[nodeList.getLength()];
        category = new TextView[nodeList.getLength()];

        for (int i = 0; i < nodeList.getLength(); i++) {

            Node node = nodeList.item(i);

            name[i] = new TextView(this);
            
            Element fstElmnt = (Element) node;
            NodeList nameList = fstElmnt.getElementsByTagName("hiddenDivHL");
            Element nameElement = (Element) nameList.item(0);
            nameList = nameElement.getChildNodes();
            name[i].setText("Name = "
                    + ((Node) nameList.item(0)).getNodeValue());

            
            layout.addView(name[i]);
            
            

        }
    } catch (Exception e) {
        System.out.println("XML Pasing Excpetion = " + e);
    }

    /** Set the layout view to display */
    setContentView(layout);

}

Answer 1

XPath 是恕我直言，是在 Java 中导航 DOM 的最常见和最简单的方法。

try{
    URL url = new URL("http://74.127.61.106/udayavaniIpad/details_android.php?home=1&   catid=882&newsid=27593");
    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
    DocumentBuilder db = dbf.newDocumentBuilder();
    Document doc = db.parse(new InputSource(url.openStream()));
    doc.getDocumentElement().normalize();

    XPath xpath = XPathFactory.newInstance().newXPath();
    String expression = "/item/div[@id='hiddenDivHL']";
    Node node = (Node) xpath.evaluate(expression, doc, XPathConstants.NODE);  

} catch (Exception e) {
    System.out.println("XML Pasing Excpetion = " + e);
}

我不确定 XPath 表达式是否正确，但链接在这里:http://developer.android.com/reference/javax/xml/xpath/package-summary.html