package com.sun.xml; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.OutputStreamWriter; import java.io.UnsupportedEncodingException; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.ParserConfigurationException; import javax.xml.transform.OutputKeys; import javax.xml.transform.Transformer; import javax.xml.transform.TransformerException; 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; import org.w3c.dom.Text; import org.xml.sax.SAXException; public class ReadXml { public static void main(String[] args) throws ParserConfigurationException, TransformerException { Document document=read("C:\\Users\\Administrator\\Desktop\\bookstore1.xml"); String path="C:\\Users\\Administrator\\Desktop\\bookstore1.xml"; addNode(document, path, "张三"); } public static Document read(String path) throws ParserConfigurationException, TransformerException{ Document document=null; DocumentBuilderFactory bf=DocumentBuilderFactory.newInstance(); DocumentBuilder builder=bf.newDocumentBuilder(); File file=new File(path); try { document= builder.parse(file); //得到值为title的标签,返回的是集合 NodeList nodeList=document.getElementsByTagName("title"); for(int i=0;i<nodeList.getLength();i++){ Node node=nodeList.item(i); String string=node.getTextContent(); System.out.println(string); updateXmlNode(document, node, "sssss", path); } } catch (SAXException | IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } return document; } public static void updateXmlNode(Document document,Node node,String text,String path) throws TransformerException, UnsupportedEncodingException, FileNotFoundException{ node.setTextContent(text); writeToFile(document, path); } public static void addNode(Document document,String path,String text){ Text text2=document.createTextNode(text); Text text3=document.createTextNode(text); Text text4=document.createTextNode(text); Element element=document.createElement("book"); Element element2=document.createElement("title"); Element element3=document.createElement("author"); Element element4=document.createElement("price"); element2.appendChild(text2); element3.appendChild(text3); element4.appendChild(text4); element.appendChild(element2); element.appendChild(element3); element.appendChild(element4); NodeList nodeList= document.getElementsByTagName("bookstore"); Node node=nodeList.item(0); node.appendChild(element); try { writeToFile(document, path); } catch (UnsupportedEncodingException | FileNotFoundException | TransformerException e) { // TODO Auto-generated catch block e.printStackTrace(); } } public static void writeToFile(Document document,String path) throws TransformerException, UnsupportedEncodingException, FileNotFoundException{ TransformerFactory transformerFactory=TransformerFactory.newInstance(); Transformer transformer=transformerFactory.newTransformer(); /* * 格式化输出xml文档,换行和缩进*/ transformer.setOutputProperty(OutputKeys.INDENT, "yes"); transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4"); //transformer.transform(new DOMSource(document), new StreamResult(path)); /* * 设置输出流的编码为UTF-8*/ OutputStreamWriter oWriter=new OutputStreamWriter(new FileOutputStream(new File(path)),"UTF-8"); document.setXmlStandalone(true); transformer.transform(new DOMSource(document),new StreamResult(oWriter)); } }
xml文件如下:
<?xml version="1.0" encoding="utf-8"?> <bookstore> <!--记录书本的信息--> <book> <title>数据结构</title> <author>严蔚敏</author> <price>30.00</price> </book> </bookstore>
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原文地址:http://matengbing.blog.51cto.com/11395502/1876353