Java XML 쓰기

다음은 javax.xml 패키지를 사용하여 Java로 XML 파일을 작성하는 예입니다.

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.w3c.dom.Document;
import org.w3c.dom.Element;

public class XMLWriter {
  public static void main(String[] args) {
    try {
      DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
      DocumentBuilder builder = factory.newDocumentBuilder();
      Document document = builder.newDocument();

      Element root = document.createElement("students");
      document.appendChild(root);

      Element student = document.createElement("student");
      root.appendChild(student);

      Element name = document.createElement("name");
      name.appendChild(document.createTextNode("John Doe"));
      student.appendChild(name);

      Element rollNo = document.createElement("rollNo");
      rollNo.appendChild(document.createTextNode("123"));
      student.appendChild(rollNo);

      Element subject = document.createElement("subject");
      subject.appendChild(document.createTextNode("Computer Science"));
      student.appendChild(subject);

      TransformerFactory transformerFactory = TransformerFactory.newInstance();
      Transformer transformer = transformerFactory.newTransformer();
      DOMSource source = new DOMSource(document);
      StreamResult result = new StreamResult("students.xml");
      transformer.transform(source, result);

      System.out.println("XML file created successfully");
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}

이 예에서는 학생에 대한 데이터가 포함된 XML 파일 "students.xml"을 만듭니다. javax.xml 패키지는 XML 문서를 만들고 변환하기 위한 클래스를 제공합니다.

DocumentBuilder 클래스는 새 XML 문서를 만드는 데 사용되고 Transformer 클래스는 XML 파일을 작성하는 데 사용됩니다.