springboot使用dom4j、Xpath解析复杂xml，请给出maven依赖已经详细的代码示例

Maven依赖：

<dependency>
    <groupId>org.dom4j</groupId>
    <artifactId>dom4j</artifactId>
    <version>2.1.3</version>
</dependency>

代码示例：

import java.io.File;
import java.util.List;

import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.Node;
import org.dom4j.io.SAXReader;

public class XmlParser {

    public static void main(String[] args) throws Exception {
        SAXReader reader = new SAXReader();
        Document doc = reader.read(new File("example.xml"));

        // 使用xpath获取节点
        Element root = doc.getRootElement();
        List<Node> nodes = root.selectNodes("//person[@age>20]");
        for (Node node : nodes) {
            Element element = (Element) node;
            System.out.println("name: " + element.attributeValue("name"));
            System.out.println("age: " + element.attributeValue("age"));
            System.out.println("address: " + element.selectSingleNode("address").getText());
            System.out.println("phone: " + element.selectSingleNode("phone").getText());
            System.out.println("===========================");
        }
    }

}