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);

            }

        }

    }

}

 List<Element> elements = rootElement.elements();

               for (Element element :elements) {

                  String id = element.attributeValue("id");

                  String message = element.attributeValue("message");

                  System.out.println(id+"   "+message);

               }

 List<Element> elements = rootElement.elements();

               for (Element element :elements) { 

                   Iterator attributeIterator = element.attributeIterator();

                   while (attributeIterator.hasNext()) {

                     Attribute attribute = (Attribute)attributeIterator.next();  

                     String name = attribute.getName();

                     String value = attribute.getValue();

                     System.out.println(name+"  "+value);

                 }

         }    

 Document docuement = reader.read(new File("./src/student.xml"));

             FileOutputStream fileOutputStream = new FileOutputStream("C:\\message.xml");

             OutputFormat outputFormat = OutputFormat.createPrettyPrint();

             XMLWriter xmlWriter = new XMLWriter(fileOutputStream,outputFormat);

             outputFormat.setEncoding("utf-8");

             xmlWriter.write(docuement);

             fileOutputStream.close();

             xmlWriter.close();