package test;

import java.io.File;
import java.util.List;

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;

public class test {
    
    public static void main(String[] args) {
        //1.获取dom4j解析对象
        SAXReader reader = new SAXReader();
        
        //2.获取要解析的xml文件
        try {
            Document document = reader.read(new File("./src/student.xml"));
            //3.获取根标签
            Element rootElement = document.getRootElement();
            
            getEachElement(rootElement);
            
            
        } catch (DocumentException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    
    public static void getEachElement(Element element) {
        System.out.println(element.getName());
        List<Element> elements = element.elements();
        if (elements!=null) {
            for (Element element2 : elements) {
                getEachElement(element2);
            }
        }
    }
    
}

1 List<Element> elements = rootElement.elements(); 
2               for (Element element :elements) { 
3                  String id = element.attributeValue("id");
4                  String message = element.attributeValue("message");
5                  System.out.println(id+"   "+message);
6               }

 1 List<Element> elements = rootElement.elements(); 
 2               for (Element element :elements) { 
 3                 
 4                   Iterator attributeIterator = element.attributeIterator();
 5                   while (attributeIterator.hasNext()) {
 6                     Attribute attribute = (Attribute)attributeIterator.next();  
 7                     
 8                     String name = attribute.getName();
 9                     String value = attribute.getValue();
10                 
11                     System.out.println(name+"  "+value);
12                     
13                 }
14                   
15         }    

1 Document docuement = reader.read(new File("./src/student.xml"));
2             FileOutputStream fileOutputStream = new FileOutputStream("C:\\message.xml");
3             
4             OutputFormat outputFormat = OutputFormat.createPrettyPrint();
5             XMLWriter xmlWriter = new XMLWriter(fileOutputStream,outputFormat);
6             outputFormat.setEncoding("utf-8");
7             xmlWriter.write(docuement);
8             fileOutputStream.close();
9             xmlWriter.close();