org.w3c.domパッケージでXMLファイルを読み込む

XMLファイル

<?xml version="1.0"?>
<students>
  <student>
    <name>name1</name>
    <age>16</age>
  </student>
  <student>
    <name>name2</name>
    <age>17</age>
  </student>
</students>

ソース

import java.io.IOException;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

public class HelloDOM {

    public static void main(String[] args) {

        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        DocumentBuilder builder = null;
        try {
            builder = factory.newDocumentBuilder();
        } catch (ParserConfigurationException e) {
            e.printStackTrace();
        }
        Document document = null;
        try {
            document = builder.parse("resource/HelloDOM.xml");
        } catch (SAXException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        Element root = document.getDocumentElement();
        NodeList list1 = root.getChildNodes();
        for (int i = 0; i < list1.getLength(); i++) {
            if (list1.item(i).getNodeName().equals("student")) {
                NodeList list2 = list1.item(i).getChildNodes();
                for (int j = 0; j < list2.getLength(); j++) {
                    switch (list2.item(j).getNodeName()) {
                    case "name":
                        System.out.println("name: " + list2.item(j).getTextContent());
                        break;

                    case "age":
                        System.out.println("age: " + list2.item(j).getTextContent());
                        break;
                    }
                }

            }
        }

    }

}

結果

name: name1
age: 16
name: name2
age: 17