java - 读取 XML 文件并将其打印到控制台

Question

我需要从我创建的 xml 文件中打印一些属性。

到目前为止，我受到 MKyoung 的启发，并对他的做了一些改变。但我无法获取 xml 属性。我想打印出“”中的名字和分数。

    <score name="Rasmus" score="10000"/>

我获取它的代码是:

public void readXMLFile() {
    try {

        File fXmlFile = new File("highscore.xml");
        DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
        DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
        Document doc = dBuilder.parse(fXmlFile);

        //optional, but recommended
        //read this - http://stackoverflow.com/questions/13786607/normalization-in-dom-parsing-with-java-how-does-it-work
        doc.getDocumentElement().normalize();

        System.out.println("Root element : " + doc.getDocumentElement().getNodeName());

        NodeList nList = doc.getElementsByTagName("Highscore");

        System.out.println("----------------------------");

        for (int temp = 0; temp < nList.getLength(); temp++) {

            Node nNode = nList.item(temp);

            System.out.println("\nCurrent Element : " + nNode.getNodeName());

            if (nNode.getNodeType() == Node.ELEMENT_NODE) {
                Element eElement = (Element) nNode;
                System.out.println("Name : " + eElement.getAttribute("score"));
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

我的名为 highscore.xml 的 xml 文件包含以下内容:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<Highscore>
  <score name="Rasmus" score="10000"/>
  <score name="Søren" score="6000"/>
  <score name="Niclas" score="5000"/>
</Highscore>

Answer 1

我已通过添加两行来编辑您的代码。检查下面。基本上，您必须迭代下一级节点。

代码:

public void readXMLFile() {
    try {

        File fXmlFile = new File("highscore.xml");
        DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
        DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
        Document doc = dBuilder.parse(fXmlFile);
        doc.getDocumentElement().normalize();
        System.out.println("Root element : " + doc.getDocumentElement().getNodeName());
        NodeList nList = doc.getElementsByTagName("Highscore");
        Node child = nList.item(0);
        NodeList nL = child.getChildNodes();    
        System.out.println("----------------------------");
        int i = 1;
        for (int temp = 0; temp < nL.getLength(); temp++) {
            Node nNode = nL.item(temp);
            if (nNode.getNodeType() == Node.ELEMENT_NODE) {
                Element eElement = (Element) nNode;
                System.out.println(i + "," + eElement.getAttribute("name") + "," + eElement.getAttribute("score"));
                i++;
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

输出:

Root element : Highscore
----------------------------
1,Rasmus,10000
2,Søren,6000
3,Niclas,5000