如何使用 StaX 获取特定 XML 标记的值 [英] How to get the value of a specific XML tag using StaX

问题描述

可能的重复:
如何使用 StaX

大家好，我有一个 XML 文件，我希望 Java 吐出特定标签的值.例如，这是我的 XML:

Hey guys so I have an XML file and I want Java to spit out the value of a specific tag. For example here is my XML:

<?xml version="1.0"?>
    <dennis>
        <hair>brown</hair>
        <pants>blue</pants>
        <gender>male</gender>
    </dennis>

所以假设我想让 Java 吐出性别"的值是否有我可以使用的代码

So let's say I want Java to spit out the value of "gender" is there code I could use like

XMLStreamReader.goToTag("gender");
System.out.println(XMLStreamReader.getLocalName());

推荐答案

您可以执行以下操作:

StreamSource xml = new StreamSource("input.xml");
XMLStreamReader xsr = xif.createXMLStreamReader(xml);
xsr.nextTag();
while(!xsr.getLocalName().equals("gender")) {
    xsr.nextTag();
}

XPath API

您也可以使用 javax.xml.xpath API:

You could also use the javax.xml.xpath APIs:

package forum12062255;

import java.io.StringReader;
import javax.xml.xpath.*;
import org.xml.sax.InputSource;

public class XPathDemo {

    private static final String XML = "<dennis><hair>brown</hair><pants>blue</pants><gender>male</gender></dennis>";

    public static void main(String[] args) throws Exception {
        XPathFactory xpf = XPathFactory.newInstance();
        XPath xPath = xpf.newXPath();

        InputSource inputSource = new InputSource(new StringReader(XML));
        String result = (String) xPath.evaluate("//gender", inputSource, XPathConstants.STRING);
        System.out.println(result);
    }

}

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