前面的XML读取算是已经完成了，现在是使用DOM对他进行增删改查，这个才是DOM的优势所在，其实代码很简单，不需要过多的解释，下面代码奉上
package com.bird.xml;import java.io.FileOutputStream;import javax.xml.parsers.DocumentBuilder;import javax.xml.parsers.DocumentBuilderFactory;import javax.xml.transform.Transformer;import javax.xml.transform.TransformerFactory;import javax.xml.transform.dom.DOMSource;import javax.xml.transform.stream.StreamResult;import org.w3c.dom.Document;import org.w3c.dom.Element;/** * @use 对XML文档进行插入删除操作 * @author Bird * */public class XmlChange { public Document getDocument() throws Exception{//返回XML文档的Document对象 //1创建工厂 DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); //2.得到解析器 DocumentBuilder builder = factory.newDocumentBuilder(); //3.解析XML文档，获得代表文档的Document Document document = builder.parse("d://book.xml"); return document; } public void add() throws Exception{//往XML文档中插入节点 Document document = getDocument(); //创建节点 Element price = document.createElement("售价"); price.setTextContent("99.00元"); //把创建的节点挂到第一本书上 Element book = (Element) document.getElementsByTagName("书").item(0); book.appendChild(price); //把更新后的内存重新写到文件中 TransformerFactory tsfactory = TransformerFactory.newInstance(); Transformer transform = tsfactory.newTransformer(); transform.transform(new DOMSource(document), new StreamResult(new FileOutputStream("d://book.xml"))); } public void add1() throws Exception{//往XML文档中指定节点处插入节点 Document document = getDocument(); //创建节点 Element price = document.createElement("售价"); price.setTextContent("99.00元"); //得到参考节点 Element refElement = (Element) document.getElementsByTagName("售价").item(0); //得到要插入的主节点 Element book = (Element) document.getElementsByTagName("书").item(0); //往book节点的指定位置插入 book.insertBefore(price, refElement); //把更新后的内存重新写到文件中 TransformerFactory tsfactory = TransformerFactory.newInstance(); Transformer transform = tsfactory.newTransformer(); transform.transform(new DOMSource(document), new StreamResult(new FileOutputStream("d://book.xml"))); } public void add2() throws Exception{//往XML文档中指定节点处更改属性 Document document = getDocument(); //得到需要插入属性的节点 Element bookname = (Element) document.getElementsByTagName("书名").item(0); //插入属性值 bookname.setAttribute("name", "XXXXX"); //把更新后的内存重新写到文件中 TransformerFactory tsfactory = TransformerFactory.newInstance(); Transformer transform = tsfactory.newTransformer(); transform.transform(new DOMSource(document), new StreamResult(new FileOutputStream("d://book.xml"))); } public void delete() throws Exception{//删除指定节点 Document document = getDocument(); //得到要删除的节点 Element e = (Element) document.getElementsByTagName("售价").item(0); //得到父节点后删除自己 e.getParentNode().removeChild(e); //把更新后的内存重新写到文件中 TransformerFactory tsfactory = TransformerFactory.newInstance(); Transformer transform = tsfactory.newTransformer(); transform.transform(new DOMSource(document), new StreamResult(new FileOutputStream("d://book.xml"))); } public void update() throws Exception{//更新指定节点内容 Document document = getDocument(); //得到需要更新的节点 Element price = (Element) document.getElementsByTagName("售价").item(0); price.setTextContent("109元"); //把更新后的内存重新写到文件中 TransformerFactory tsfactory = TransformerFactory.newInstance(); Transformer transform = tsfactory.newTransformer(); transform.transform(new DOMSource(document), new StreamResult(new FileOutputStream("d://book.xml"))); } public static void main(String [] args) throws Exception{ XmlChange xml = new XmlChange(); // xml.add(); // xml.add1();//往指定位置插入元素 // xml.add2();//往指定节点添加属性 // xml.delete();//删除指定的节点 xml.update();//更新指定节点内容 }}再分享一下我老师大神的人工智能教程吧。零基础！通俗易懂！风趣幽默！还带黄段子！希望你也加入到我们人工智能的队伍中来！https://blog.csdn.net/jiangjunshow