java对XML文件的解析、节点的增加、删除操作总结

先贴代码吧
感谢：http://xranming.blog.163.com/blog/static/24204952009914104148872/
 http://www.diybl.com/course/3_program/java/javajs/20090303/157541.html
1、java代码：
主要采用dom来进行操作
java对xml操作有四种方法：http://passmatlab.bokee.com/3455905.html
 package test;
import java.io.IOException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
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.NodeList;
import org.w3c.dom.Text;
import org.xml.sax.SAXException;
public class XmlOprate {
 Document doc;
 DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
 DocumentBuilder builder;
 NodeList imags;
 String path;
 
 public NodeList getImags() {
  return imags;
 }
 public void setImags(NodeList imags) {
  this.imags = imags;
 }
 
 /**
  * 构造方法
  * @param path:xml文件的路径
  * @param nodes：要解析的xml节点名称
  */
 public XmlOprate(String path) {
  super();
  this.path = path;
  System.out.println(System.getProperty("user.dir"));
 }
 /**
  * 解析XML
  * @param path
  */
 public  void readXml(){
  try {
   builder = factory.newDocumentBuilder();
   Document doc=builder.parse(path);
   doc.normalize();
   
   NodeList imags =doc.getElementsByTagName("imags");
   this.setImags(imags);
   for (int i=0;