DOM方法写入XML文件

import java.io.File;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
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 DomTest {
public static void main(String[] args) {
DomTest domtest = new DomTest();
domtest.createXML();
}

public DocumentBuilder getDocumentBuilder() {
// 创建一个DocumentBuilderFactory的对象
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
// 创建DocumentBuilder对象
DocumentBuilder db = null;
try {
db = dbf.newDocumentBuilder();
} catch (ParserConfigurationException e) {
e.printStackTrace();
}
return db;
}

/**
* 生成xml
*/
public void createXML() {
DocumentBuilder db = getDocumentBuilder();
Document document = db.newDocument();
document.setXmlStandalone(true);
Element bookstore = document.createElement("bookStore");
// 向bookstore根节点中添加子节点book
Element book = document.createElement("book");
Element name = document.createElement("name");
// name.setNodeValue("小王子");
name.setTextContent("小王子");

book.appendChild(name);
book.setAttribute("id", "1");
// 将book节点添加到bookstore根节点中
bookstore.appendChild(book);
// 将bookstore节点（已经包含了book）添加到dom树中
document.appendChild(bookstore);
// 创建TransformerFactory对象
TransformerFactory tff = TransformerFactory.newInstance();
try {
// 创建Transformer对象
Transformer tf = tff.newTransformer();
tf.setOutputProperty(OutputKeys.INDENT, "yes");
tf.transform(new DOMSource(document), new StreamResult(new File("f:\\a.xml")));
} catch (TransformerConfigurationException e) {
e.printStackTrace();
} catch (TransformerException e) {
e.printStackTrace();
}
}

}