在Java中获取特定的XML标记元素

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;

public class XMLParser {
    public static void main(String[] args) {
        try {
            // 创建DOM解析器工厂
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            // 创建DOM解析器
            DocumentBuilder builder = factory.newDocumentBuilder();
            // 加载XML文档
            Document document = builder.parse("path/to/xml/file.xml");
            
            // 获取特定标记元素
            NodeList nodeList = document.getElementsByTagName("elementName");
            for (int i = 0; i < nodeList.getLength(); i++) {
                Element element = (Element) nodeList.item(i);
                // 处理元素
                String value = element.getTextContent();
                System.out.println(value);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

public class XMLParser {
    public static void main(String[] args) {
        try {
            // 创建SAX解析器工厂
            SAXParserFactory factory = SAXParserFactory.newInstance();
            // 创建SAX解析器
            SAXParser parser = factory.newSAXParser();
            // 创建自定义的处理器
            MyHandler handler = new MyHandler();
            // 解析XML文档
            parser.parse("path/to/xml/file.xml", handler);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    
    static class MyHandler extends DefaultHandler {
        private boolean isElement = false;
        
        @Override
        public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
            if (qName.equalsIgnoreCase("elementName")) {
                isElement = true;
            }
        }
        
        @Override
        public void characters(char[] ch, int start, int length) throws SAXException {
            if (isElement) {
                String value = new String(ch, start, length);
                System.out.println(value);
            }
        }
        
        @Override
        public void endElement(String uri, String localName, String qName) throws SAXException {
            if (qName.equalsIgnoreCase("elementName")) {
                isElement = false;
            }
        }
    }
}