Java Stax如何仅获取特定子节点的值

import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import java.io.FileInputStream;
import java.io.FileNotFoundException;

public class StaxExample {
    public static void main(String[] args) {
        try {
            // 创建XML输入工厂
            XMLInputFactory factory = XMLInputFactory.newInstance();
            
            // 创建XMLStreamReader对象
            XMLStreamReader reader = factory.createXMLStreamReader(new FileInputStream("example.xml"));
            
            // 遍历XML文档
            while (reader.hasNext()) {
                int event = reader.next();
                
                // 判断当前事件类型是否为元素的开始
                if (event == XMLStreamConstants.START_ELEMENT) {
                    // 判断当前元素是否为目标节点
                    if (reader.getLocalName().equals("targetNode")) {
                        // 获取目标节点的值
                        String value = reader.getElementText();
                        System.out.println("目标节点的值：" + value);
                    }
                }
            }
            
            // 关闭XMLStreamReader
            reader.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (XMLStreamException e) {
            e.printStackTrace();
        }
    }
}