Dom4J解析xml

package com.shengsiyuan.dom4j;import java.io.File;import java.util.Iterator;import java.util.List;import javax.xml.parsers.DocumentBuilder;import javax.xml.parsers.DocumentBuilderFactory;import org.dom4j.Document;import org.dom4j.Element;import org.dom4j.io.DOMReader;import org.dom4j.io.SAXReader;public class Test2{public static void main(String[] args) throws Exception{SAXReader saxReader = new SAXReader();Document doc = saxReader.read(new File("student2.xml"));Element root = doc.getRootElement();System.out.println("root element: " + root.getName());List childList = root.elements();System.out.println(childList.size());List childList2 = root.elements("hello");System.out.println(childList2.size());Element first = root.element("hello");System.out.println(first.attributeValue("age"));for(Iterator iter = root.elementIterator(); iter.hasNext();){Element e = (Element)iter.next();System.out.println(e.attributeValue("age"));}System.out.println("---------------------------");DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();DocumentBuilder db = dbf.newDocumentBuilder();org.w3c.dom.Document document = db.parse(new File("student2.xml"));DOMReader domReader = new DOMReader();//将JAXP的Document转换为dom4j的DocumentDocument d = domReader.read(document);Element rootElement = d.getRootElement();System.out.println(rootElement.getName());}}