java - 如何从 XML 中的特定标记获取所有值？

Question

我有file.xml我需要用java提取 <command> 中的所有值标签:

<?xml version="1.0"?>
<config>
<command> com1 </command>
<result> res1 </result>
<command> com2 </command>
<result> res2 </result>
</config>

可能存在一些方法可以将此值提取到 ArrayList 吗？

Answer 1

XPATH 是一个不错的选择。请检查下面的代码，它可以帮助您

    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    DocumentBuilder builder =  factory.newDocumentBuilder();
    Document doc = builder.parse("test.xml");

    XPathFactory xFactory = XPathFactory.newInstance();
    XPath xpath = xFactory.newXPath();
    XPathExpression  expr = xpath.compile("//command/text()");
    Object result = expr.evaluate(doc, XPathConstants.NODESET);

    NodeList nodes = (NodeList) result;
    for (int i=0; i<nodes.getLength();i++){
      System.out.println(nodes.item(i).getNodeValue());
    }