Question

我有一个id为属性的xml文件。

  <?xml version="1.0" encoding="utf-8"?>

 <animalguesser>

<query id = "1" >


  <data> Welcome to Animal Guessing Game !!!!!!! </data>

    <choices>

        <choice jumptoid = "2" > continue </choice>
        <choice jumptoid = "39" > exit </choice>

    </choices>

 </query>

 <query id = "2" >
   <data> Is this a mammal ? </data>

    <choices>

        <choice jumptoid = "3" > yes </choice>
        <choice jumptoid = "11" > no </choice>

    </choices>

我使用DOM解析了xml文件，我想做的是从用户那里获取输入，将它与选择的jumptoid匹配并返回结果并继续，是否有可以在dom和java中执行此操作？感谢

Answer 1

试试这个：

String outputString="Your xml string";      
Document document = parseXmlFile(outputString);
javax.xml.xpath.XPath xpath = XPathFactory.newInstance().newXPath();
System.out.println("Enter number ");
Scanner sc = new Scanner(System.in);
int i = sc.nextInt();
sc.close();
Element e = (Element) xpath.evaluate("//query[@id='"+i+ "']", document, XPathConstants.NODE);

使用示例XML进行测试并且工作正常。

有关语法规则，请参阅此站点

http://viralpatel.net/blogs/java-xml-xpath-tutorial-parse-xml/

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