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database.xml

<?xml version="1.0" encoding="utf-8"?>
<config>
    <database-info>
        <driver-name>com.mysql.jdbc.Driver</driver-name>
        <url>jdbc:mysql://192.168.1.151:3306/db_test</url>
        <user>root</user>
        <password>123</password>
    </database-info>
</config>

package edu.aeon.xml;

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

/**
 * [说明]:dom4j+xpath解析xml文档
 * 需要jar包：
 *     dom4j-1.6.1.jar
 *     jaxen-1.1-beta-7.jar
 * @author aeon(qq:1584875179)
 *
 */
public class Dom4jXpath {

    public static void main(String[] args) {
        try {
            SAXReader saxReader=new SAXReader();
            Document document=saxReader.read("config/database.xml");
            //driver-name节点元素的路径：config->database-info->driver-name
            /**
             * 对应xpath路径写法为：
             *     /config/database-info/driver-name
             *     config//driver-name
             *     //driver-name
             */
            Element driverNameElement=(Element) document.selectSingleNode("/config/database-info/driver-name");//选上面三种里面的任何一种xpath路径即可
            //获取driverNameElement节点元素对象的内容
            String driverNameElementContext=driverNameElement.getStringValue();
            System.out.println(driverNameElementContext);
        } catch (DocumentException e) {
            e.printStackTrace();
        }
    }
}

结果截图：