DOM4J解析XML文件

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;

import java.io.FileWriter;
import java.io.IOException;
import java.util.Iterator;


public class Test {
    private Document document;

    public static void main(String[] args) {
        Test test = new Test();
        test.create();
        test.show();
        test.add();
        test.update();
        test.delete();
    }


    //创建document对象
    public void create() {
        SAXReader saxReader = new SAXReader();
        try {
            document = saxReader.read("src/Xml/收藏信息2.xml");
        } catch (DocumentException e) {
            e.printStackTrace();
        }
    }


    //展示信息
    public void show() {
        //直接获取根元素节点
        Element element = document.getRootElement();
        //遍历Iterator
        Iterator it = element.elementIterator();
        while (it.hasNext()) {
            Element element1 = (Element) it.next();
            System.out.println(element1.attributeValue("name"));
            Iterator it1 = element1.elementIterator();
            while (it1.hasNext()) {
                Element element2 = (Element) it1.next();
                System.out.println(element2.attributeValue("name"));
            }
        }
    }


    //新增信息
    public void add() {
        Element element = document.getRootElement();
        Element element1 = element.addElement("Brand");
        element1.addAttribute("id", "中国");
        element1.addAttribute("name", "三星");
        Element element2 = element1.addElement("Type");
        element2.addAttribute("name", "note4");
        save();
    }


    //保存信息
    public void save() {
        XMLWriter xmlWriter = null;
        try {
            OutputFormat outputFormat = OutputFormat.createPrettyPrint();
            outputFormat.setEncoding("UTF-8");
            xmlWriter = new XMLWriter(new FileWriter("src/Xml/收藏信息2.xml"));
            xmlWriter.write(document);

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                xmlWriter.close();
            } catch (IOException e) {
                e.printStackTrace();
            }

        }
    }

    //修改信息
    public void update() {
        Element element = document.getRootElement();
        Iterator it = element.elementIterator();
        while (it.hasNext()) {
            Element element1 = (Element) it.next();
            if (element1.attributeValue("name").equals("三星")) {
                element1.addAttribute("id","韩国");
            }
        }
        save();
    }

    //删除信息
    public void delete(){
        Element element = document.getRootElement();
        Iterator it = element.elementIterator();
        while(it.hasNext()){
            Element element1 = (Element) it.next();
            if(element1.attributeValue("name").equals("三星")){
                element1.getParent().remove(element1);
            }
        }
        save();
    }
}

=========================================================================

XML文件

<?xml version="1.0" encoding="UTF-8"?>
<PhoneInfo>
    <Brand name="华为">
        <Type name="U8650"/>
        <Type name="HW123"/>
        <Type name="HW321"/>
    </Brand>
    <Brand name="苹果">
        <Type name="iPhone4"/>
    </Brand>

    <Brand id="韩国" name="三星">
        <Type name="note4"/>
    </Brand>
</PhoneInfo>