Java调用XML的方法：DocumentBuilderFactory
首先得到：得到DOM解析器的工厂实例???? DocumentBuilderFactory?domfac=DocumentBuilderFactory.newInstance();
然后从DOM工厂获得DOM解析器
?DocumentBuilder?dombuilder=domfac.newDocumentBuilder();
?
3）把要解析的XML文档转化为输入流，以便DOM解析器解析它
InputStream?is=new?FileInputStream("test1.xml");????????
（4）解析XML文档的输入流，得到一个Document
?Document?doc=dombuilder.parse(is);
（5）得到XML文档的根节点
Element?root=doc.getDocumentElement();
（6）得到节点的子节点
? NodeList?books=root.getChildNodes();
?
package com.st.demo;import java.io.File;import java.io.FileInputStream;import java.io.InputStream;import javax.xml.parsers.DocumentBuilder;import javax.xml.parsers.DocumentBuilderFactory;import org.w3c.dom.Document;import org.w3c.dom.Element;import org.w3c.dom.Node;import org.w3c.dom.NodeList;public class XmlReader {public static void main(String[] args) {XmlReader reader = new XmlReader();}public XmlReader(){DocumentBuilderFactory domfac = DocumentBuilderFactory.newInstance();try {DocumentBuilder domBuilder = domfac.newDocumentBuilder();InputStream is = new FileInputStream(new File("D:/test1.xml"));Document doc = domBuilder.parse(is);Element root = doc.getDocumentElement();NodeList books = root.getChildNodes();if(books!=null){for (int i = 0; i < books.getLength(); i++) {Node book = books.item(i); if(book.getNodeType()==Node.ELEMENT_NODE) { //（7）取得节点的属性值 String email=book.getAttributes().getNamedItem("email").getNodeValue(); System.out.println(email); //注意，节点的属性也是它的子节点。它的节点类型也是Node.ELEMENT_NODE //（8）轮循子节点 for(Node node=book.getFirstChild();node!=null;node=node.getNextSibling()) { if(node.getNodeType()==Node.ELEMENT_NODE) { if(node.getNodeName().equals("name")) { String name=node.getNodeValue(); String name1=node.getFirstChild().getNodeValue(); System.out.println(name); System.out.println(name1); } if(node.getNodeName().equals("price")) { String price=node.getFirstChild().getNodeValue(); System.out.println(price); } } } }}}} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}}}?<?xml version="1.0" encoding="GB2312" standalone="no"?><books> <book email="zhoujunhui"> <name>rjzjh</name> <price>jjjjjj</price> </book></books>?