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();

     }

 }