<?xml version="1.0" encoding="GBK" ?>
<address>
<person><name>老王</name><sex>男</sex><phone>15520080563</phone>
</person>
<person><name>老大</name><sex>男</sex><phone>15520080563</phone>
</person>
</address>

import java.io.File;import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;public class readXmlByDom {/*** @param args*/public static void main(String[] args) throws Exception{// TODO Auto-generated method stubDocumentBuilderFactory factory=DocumentBuilderFactory.newInstance();//新建工厂对象DocumentBuilder builder=factory.newDocumentBuilder();//实例化builder对象Document doc=builder.parse(new File("D:/学习资料/JAVA/软件/work/xml/src/demo1.xml"));NodeList nl = doc.getElementsByTagName("person") ;for(int x=0;x<nl.getLength();x++){Element e = (Element) nl.item(x) ;    // 取出每一个元素System.out.println("姓名：" + e.getElementsByTagName("name").item(0).getFirstChild().getNodeValue()) ;System.out.println("电话：" + e.getElementsByTagName("phone").item(0).getFirstChild().getNodeValue()) ;}}}

姓名：老王
电话：15520080563
姓名：老大
电话：15520080563

import java.io.* ;
import org.w3c.dom.* ;
import javax.xml.parsers.* ;
import javax.xml.transform.* ;
import javax.xml.transform.dom.* ;
import javax.xml.transform.stream.* ;public class  hh{public static void main(String args[]) throws Exception {// 取得DocumentBuilderFactory类的对象DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance() ;// 取得DocumentBuilder类的对象DocumentBuilder build = factory.newDocumentBuilder()  ;Document doc = build.newDocument() ;    // 创建一个新的XML文档Element addresslist = doc.createElement("addresslist") ;Element linkman = doc.createElement("linkman") ;Element name = doc.createElement("name") ;Element email = doc.createElement("email") ;// 设置节点内容name.appendChild(doc.createTextNode("老王")) ;email.appendChild(doc.createTextNode("wanglei134@foxmail.com")) ;// 该设置各个节点的关系linkman.appendChild(name) ;    // name是linkeman的子节点linkman.appendChild(email) ;    // email是linkman的子节点
        addresslist.appendChild(linkman) ;doc.appendChild(addresslist) ;TransformerFactory tf = TransformerFactory.newInstance() ;Transformer t = tf.newTransformer() ;t.setOutputProperty(OutputKeys.ENCODING, "GBK")  ;    // 处理中文的DOMSource source = new DOMSource(doc) ;    // 准备输出文档StreamResult result = new StreamResult(new File("d:"+File.separator+"output.xml")) ;t.transform(source,result) ;}
}