JAXP 的DOM 解析

// xmlDemo.xml xml 測試文件

<?xml version="1.0" encoding="utf-8" standalone="no"?><book>
    <bookName>THINK IN JAVA</bookName>
    <author>ldh</author>
    <price>1000</price>
</book>

//xmlDemo.class

package demo1007;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

/**
 * JAXP 的dom 解析
 */
public class xmlDemo {
    public static void main(String[] args) throws Exception {
        DocumentBuilderFactory factory =DocumentBuilderFactory.newInstance();
        DocumentBuilder db = factory.newDocumentBuilder();
        Document document = db.parse("d:\\test\\xmlDemo.xml");
        Node book = document.getElementsByTagName("book").item(0);
        NodeList childNodes = book.getChildNodes();
        //遍歷book所有節點
        for(int i=0;i<childNodes.getLength();i++) {
            Node node = childNodes.item(i);
            String nodeName = node.getNodeName();
            System.out.println(nodeName+" "+node.getTextContent());
        }
//        // 在book節點下增加一個節點
//        Element date = document.createElement("date");
//        date.setTextContent("2016-10-08");
//        book.appendChild(date);

//        //刪除date節點
//        Node date = document.getElementsByTagName("date").item(0);
//        Node node = date.getParentNode().removeChild(date);
//        System.out.println("delete node : "+ node.getNodeName());

        //回寫
        Transformer transformer = TransformerFactory.newInstance().newTransformer();
        transformer.transform(new DOMSource(document), new StreamResult("d:\\test\\xmlDemo.xml"));

    }
}