Java xml 添加节点

建立一个xml文件test.xml，文件内容如下

通过java操作生成xml节点的文件test.java，文件内容：

package com.pb.test;

import java.io.FileOutputStream;

import javax.xml.parsers.DocumentBuilder;

import javax.xml.parsers.DocumentBuilderFactory;

import javax.xml.transform.OutputKeys;

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;

import org.w3c.dom.Node;

import org.w3c.dom.NodeList;

public class Test {

public static void main(String[] args) {

try {

// 1.得到DOM解析器的工厂实例

DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();

// 2.从DOM工厂里获取DOM解析器

DocumentBuilder db = dbf.newDocumentBuilder();

// 3.解析XML文档，得到document，即DOM树

Document doc = db.parse(“src/test.xml”);

// 创建节点

Element brandElement = doc.createElement(“Brand”);

brandElement.setAttribute(“name”, “华为”);

//创建type节点

Element typeElement=doc.createElement(“Type”);

typeElement.setAttribute(“name”, “U8650”);

//添加父子关系

brandElement.appendChild(typeElement);

Element phoneElement=(Element)doc.getElementsByTagName(“PhoneInfo”).item(0);

phoneElement.appendChild(brandElement);

//保存xml文件

TransformerFactory transformerFactory=TransformerFactory.newInstance();

Transformer transformer=transformerFactory.newTransformer();

DOMSource domSource=new DOMSource(doc);

//设置编码类型

transformer.setOutputProperty(OutputKeys.ENCODING, “GB2312”);

StreamResult result=new StreamResult(new FileOutputStream(“src/test.xml”));

//把DOM树转换为xml文件

transformer.transform(domSource, result);

} catch (Exception ex) {

System.out.println(ex.getMessage());

}

}

}