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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：
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<?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> |
