解析XML文件——JDOM基本操作

注意，下载完JDOM的组件后，只需要将jdom-2.0.6.jar这一个jar包导入编译器即可

1.JDOM生成XML文件

import org.jdom2.Attribute;
import org.jdom2.Document;
import org.jdom2.Element;
import org.jdom2.output.XMLOutputter;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

public class Main {
    public static void main(String[] args) {
        //定义各个节点
        Element stulist = new Element("stulist");
        Element link = new Element("link");
        Element name = new Element("name");
        Element age = new Element("age");

        //定义属性
        Attribute id = new Attribute("id","id");
        //声明Document对象
        Document doc = new Document(stulist);
        //设置元素内容
        name.setText("cc");
        age.setText("17");
        //设置name的属性
        name.setAttribute(id);
        //设置子节点
        link.addContent(name);
        link.addContent(age);
        stulist.addContent(link);
        //用来输出XML文件
        XMLOutputter op = new XMLOutputter();
        //设置输出的编码
        op.setFormat(op.getFormat().setEncoding("utf-8"));
        try {
            //输出XML文件
            op.output(doc,new FileOutputStream("C:" + File.separator + "JDOM.xml"));
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

2.JDOM读取XML文件

import org.jdom2.Document;
import org.jdom2.Element;
import org.jdom2.input.SAXBuilder;

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

public class Main {
    public static void main(String[] args) throws Exception {
        //建立SAX解析
        SAXBuilder buil = new SAXBuilder();
        //找到Document
        Document read_doc = buil.build("C:" +  File.separator + "JDOM.xml");
        //读取根元素
        Element stu = read_doc.getRootElement();
        //得到全部link元素
        List list = stu.getChildren("link");

        for (int i = 0; i < list.size(); i++) {
            //取得一个link子元素
            Element e = (Element) list.get(i);
            //取name元素内容
            String name = e.getChildText("name");
            //取得name元素的id属性
            String id = e.getChild("name").getAttribute("id").getValue();
            //取得age元素内容
            String age = e.getChildText("age");
            System.out.println("--联系人--");
            System.out.println("id:" + id);
            System.out.println("name:" + name + ",age:" + age);
            System.out.println("-------");
        }
    }
}