解析XML文件——DOM4J基本操作

注意，下載完DOM4J的組件後，只需要將dom4j-1.6.1.jar、jaxen-1.1-beta-6.jar這兩個jar包導入編譯器即可

1.DOM4J生成XML文件

import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.XMLWriter;

import java.io.*;

public class Main {
    public static void main(String[] args) {
        //創建文檔
        Document doc = DocumentHelper.createDocument();
        //定義節點
        Element stulist = doc.addElement("stulist");
        Element link = stulist.addElement("link");
        Element name = link.addElement("name");
        Element age = link.addElement("age");
        //設置節點內容
        name.setText("ll");
        age.setText("18");
        //設置輸出格式
        OutputFormat fm = OutputFormat.createPrettyPrint();
        //指定輸出編碼
        fm.setEncoding("tuf-8");
        try {  //向文件輸出XML文檔
            //輸出文件
            XMLWriter wr = new XMLWriter(new FileOutputStream(new File("C:" + File.separator + "Dom4J.xml")));
            //輸出內容
            wr.write(doc);
            wr.close();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

2.DOM4J讀取XML文件

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

import java.io.File;
import java.util.Iterator;

public class Main {
    public static void main(String[] args) {
        //讀取文件
        File file = new File("C:" + File.separator + "Dom4J.xml");
        //建立SAX解析讀取
        SAXReader rd = new SAXReader();
        Document doc = null;
        try {
            //讀取文件
            doc = rd.read(file);
        } catch (DocumentException e) {
            e.printStackTrace();
        }
        //取得根節點
        Element root = doc.getRootElement();
        //取得全部子節點
        Iterator iter = root.elementIterator();
        while (iter.hasNext()) {
            //取得每個link
            Element link = (Element) iter.next();
            System.out.println("name:" + link.elementText("name"));
            System.out.println("age:" + link.elementText("age"));
        }
    }
}