import java.io.File;

 import java.io.IOException;

 import javax.xml.parsers.ParserConfigurationException;

 import org.dom4j.Document;

 import org.dom4j.DocumentException;

 import org.dom4j.Element;

 import org.dom4j.io.SAXReader;

 import org.xml.sax.SAXException;

 public class Dom4jDemo {

     public static void main(String[] args) throws ParserConfigurationException, DocumentException, SAXException, IOException {

         SAXReader saxReader = new SAXReader();// new读取的类

         Document doc = saxReader.read(new File("F:\\MyEclipse Work\\lj_API\\XML\\com\\luo\\kcit\\XML\\Dom4j\\student.xml"));

         // 读取指定的文档

         Element root = doc.getRootElement();// 返回元素节点

         System.out.println("root element: " + root.getName());// 输出根节点名称

         Element e = root.element("student");

         Element userId = e.element("userId");//判断是否有userid这个元素,有的话,返回到Element类型的userId

         System.out.print(userId.getName()+":"+userId.getData()+"  ");

         System.out.println("id:" + userId.attributeValue("id"));// 返回元素的字段

         Element name = e.element("name");

         System.out.println(name.getName() + ": " + name.getData());

         Element sex  = e.element("sex");

         System.out.println(sex.getName()+":"+sex.getData());    

     }

 }

<?xml version="1.0" encoding="UTF-8"?>

<cla>

    <student>

        <userId id="1">A110</userId>

        <name>Toolo</name>

        <age>23</age>

        <sex>男</sex>

    </student>

</cla>