简单DOM解析之dom4j(二)

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package dom;import java.io.File;import java.io.FileWriter;import java.io.IOException;import java.io.OutputStream;import java.util.Iterator;import java.util.List;import org.dom4j.Document;import org.dom4j.DocumentException;import org.dom4j.Element;import org.dom4j.io.OutputFormat;import org.dom4j.io.SAXReader;import org.dom4j.io.XMLWriter;public class DomOperate{public static void main(String[] args) {try {File file=new File("f://test/dom.xml");SAXReader reader=new SAXReader();Document document=reader.read(file);Element root=document.getRootElement();/* * 遍历节点 */        List<Element> list=root.elements("user");        Iterator<Element> it=list.iterator();        while(it.hasNext()){        Element element=it.next();        System.out.println(element.elementText("name"));        }                //addNode(file, document, root);//添加节点        //deleteNode(file, document, root);//删除节点       } catch (DocumentException e) {e.printStackTrace();}}/** * 删除节点 * @param file * @param document * @param root */private static void deleteNode(File file, Document document, Element root) {Element element=root.element("add");        element.getParent().remove(element);        submit(file, document);        System.out.println("del success");}/** * 添加节点 * @param file * @param document * @param root */private static void addNode(File file, Document document, Element root) {Element element=root.addElement("add");        element.setText("测试添加");        submit(file, document);        System.out.println("add success");}/** * 保存xml * @param file * @param document * @throws IOException */private static void submit(File file, Document document) {        try {        OutputFormat format=OutputFormat.createPrettyPrint();            format.setEncoding("utf-8");            XMLWriter writer=new XMLWriter(new FileWriter(file));            writer.write(document);            writer.flush();writer.close();} catch (IOException e) {e.printStackTrace();}}}

dom.xml

<?xml version="1.0" encoding="UTF-8"?><root>    <user>   <name>张三</name>   <age>12</age></user><user>   <name>李四</name>   <age>15</age></user></root>

jar包：dom4j-1.6.1.jar

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