dom4j解析示例

收藏信息.xml

解析示例：

1 import java.io.File;
  2 import java.io.FileWriter;
  3 import java.io.IOException;
  4 import java.util.Iterator;
  5 
  6 import org.dom4j.Document;
  7 import org.dom4j.DocumentException;
  8 import org.dom4j.Element;
  9 import org.dom4j.io.OutputFormat;
 10 import org.dom4j.io.SAXReader;
 11 import org.dom4j.io.XMLWriter;
 12 
 13 
 14 public class Dom4jParse {
 15     public static Document document;
 16     
 17     //获取DOM
 18     public static void getDom(){
 19         SAXReader saxReader = new SAXReader();
 20         try {
 21             document = saxReader.read(new File("收藏信息.xml"));
 22         } catch (DocumentException e) {
 23             e.printStackTrace();
 24         }
 25         
 26     }
 27     
 28     
 29     //获取所有节点信息
 30     public static void showInfo(){
 31         Element root = document.getRootElement();
 32         for(Iterator itBrand=root.elementIterator();itBrand.hasNext();){
 33             Element brand = (Element) itBrand.next();
 34             System.out.println("品牌"+brand.attributeValue("name"));
 35             for(Iterator itType=brand.elementIterator();itType.hasNext();){
 36                 Element type = (Element) itType.next();
 37                 System.out.println("\t型号"+type.attributeValue("name"));
 38             }
 39         }
 40         
 41     }
 42     
 43     //添加节点
 44     public static void addNode(){
 45         Element root = document.getRootElement();
 46         Element eBrand = root.addElement("Brand");
 47         eBrand.addAttribute("name", "诺基亚");
 48         Element eType = eBrand.addElement("type");
 49         eType.addAttribute("name", "直板");
 50         saveXml("收藏信息.xml");
 51     }
 52     
 53     //更新节点，添加ID属性
 54     public static void updateNode(){
 55         Element root = document.getRootElement();
 56         int id=0;
 57         for(Iterator iBrand=root.elementIterator();iBrand.hasNext();){
 58             Element brand = (Element)iBrand.next();
 59             id++;
 60             brand.addAttribute("id", id+"");
 61         }
 62         saveXml("收藏信息.xml");
 63     }
 64     
 65     
 66     //删除节点
 67     public static void deleteNode(){
 68         Element root = document.getRootElement();
 69         for(Iterator iBrand=root.elementIterator();iBrand.hasNext();){
 70             Element brand = (Element)iBrand.next();
 71             if(brand.attributeValue("name").equals("诺基亚")){
 72                 brand.getParent().remove(brand);
 73             }
 74         }
 75         saveXml("收藏信息.xml");
 76     }
 77     
 78     
 79     
 80     
 81     
 82     
 83     //保存XML
 84     public static void saveXml(String path){
 85         //输出格式转换器
 86         OutputFormat format = OutputFormat.createPrettyPrint();
 87         format.setEncoding("GBK2312");
 88         XMLWriter writer;
 89         try {
 90             writer = new XMLWriter(new FileWriter(path), format);
 91             writer.write(document);
 92             writer.close();
 93         } catch (IOException e) {
 94             e.printStackTrace();
 95         }
 96     }
 97     
 98     
 99     public static void main(String[] args) {
100         Dom4jParse dp = new Dom4jParse();
101         dp.getDom();
102         dp.showInfo();
103         
104     }
105     
106     
107     
108     
109     
110 }