java程式碼：

package test;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
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 XmlCreator {
	public static void main(String[] args) {
		// 建立DocumentBuilderFactory物件
		DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
		// 建立DocumentBuilder物件
		DocumentBuilder docBulider;
		try {
			docBulider = dbf.newDocumentBuilder();
			// 建立Document物件，Document物件表示整個 HTML 或 XML 文件
			Document document = docBulider.newDocument();
			Element bookstore = document.createElement("bookstore");
			Element book = document.createElement("book");
			Element bookName = document.createElement("name");
			Element year = document.createElement("year");
			bookName.setTextContent("活著");
			year.setTextContent("2015");
			book.setAttribute("id", "123");
			document.appendChild(bookstore);
			bookstore.appendChild(book);
			book.appendChild(bookName);
			book.appendChild(year);
			// 接下來將Element物件轉換成xml文件
			TransformerFactory tff = TransformerFactory.newInstance();
			Transformer tf = tff.newTransformer();
			tf.transform(new DOMSource(bookstore), new StreamResult("book1.xml"));
		} catch (ParserConfigurationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (TransformerConfigurationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (TransformerException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

	}
}
 

生成的book1.xml檔案如下

<?xml version="1.0" encoding="UTF-8"?>
<bookstore>
	<book id="123">
		<name>活著</name>
		<year>2015</year>
	</book>
</bookstore>