dom4j解析示例

收藏信息.xml

<?xml version="1.0" encoding="GB2312" standalone="no"?><PhoneInfo>

    <Brand id="" name="华为">

        <Type name="U8650"/>

        <Type name="HW123"/>

        <Type name="HW321"/>

    </Brand>

    <Brand id="" name="苹果">

        <Type name="iPhone4"/>

    </Brand>

<Brand id="" name="三星"><type name="s120"/></Brand></PhoneInfo>

解析示例：

 import java.io.File;

 import java.io.FileWriter;

 import java.io.IOException;

 import java.util.Iterator;

 import org.dom4j.Document;

 import org.dom4j.DocumentException;

 import org.dom4j.Element;

 import org.dom4j.io.OutputFormat;

 import org.dom4j.io.SAXReader;

 import org.dom4j.io.XMLWriter;

 public class Dom4jParse {

     public static Document document;

     //获取DOM

     public static void getDom(){

         SAXReader saxReader = new SAXReader();

         try {

             document = saxReader.read(new File("收藏信息.xml"));

         } catch (DocumentException e) {

             e.printStackTrace();

         }

     }

     //获取所有节点信息

     public static void showInfo(){

         Element root = document.getRootElement();

         for(Iterator itBrand=root.elementIterator();itBrand.hasNext();){

             Element brand = (Element) itBrand.next();

             System.out.println("品牌"+brand.attributeValue("name"));

             for(Iterator itType=brand.elementIterator();itType.hasNext();){

                 Element type = (Element) itType.next();

                 System.out.println("\t型号"+type.attributeValue("name"));

             }

         }

     }

     //添加节点

     public static void addNode(){

         Element root = document.getRootElement();

         Element eBrand = root.addElement("Brand");

         eBrand.addAttribute("name", "诺基亚");

         Element eType = eBrand.addElement("type");

         eType.addAttribute("name", "直板");

         saveXml("收藏信息.xml");

     }

     //更新节点，添加ID属性

     public static void updateNode(){

         Element root = document.getRootElement();

         int id=0;

         for(Iterator iBrand=root.elementIterator();iBrand.hasNext();){

             Element brand = (Element)iBrand.next();

             id++;

             brand.addAttribute("id", id+"");

         }

         saveXml("收藏信息.xml");

     }

     //删除节点

     public static void deleteNode(){

         Element root = document.getRootElement();

         for(Iterator iBrand=root.elementIterator();iBrand.hasNext();){

             Element brand = (Element)iBrand.next();

             if(brand.attributeValue("name").equals("诺基亚")){

                 brand.getParent().remove(brand);

             }

         }

         saveXml("收藏信息.xml");

     }

     //保存XML

     public static void saveXml(String path){

         //输出格式转换器

         OutputFormat format = OutputFormat.createPrettyPrint();

         format.setEncoding("GBK2312");

         XMLWriter writer;

         try {

             writer = new XMLWriter(new FileWriter(path), format);

             writer.write(document);

             writer.close();

         } catch (IOException e) {

             e.printStackTrace();

         }

     }

     public static void main(String[] args) {

         Dom4jParse dp = new Dom4jParse();

         dp.getDom();

         dp.showInfo();

     }

 }