怎么添加html根标记,Java HTML/XML - 如何从根元素标记名称创建DOM文档

import java.io.StringWriter;

import javax.xml.parsers.DocumentBuilderFactory;

import javax.xml.transform.Transformer;

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 Main {

public static void main(String[] argv) throws Exception {

Document doc = createXmlDocument("root");

System.out.println(documentToString(doc));

}

/**

* Start a new XML Document.

* @param rootName The name of the Document root Element (created here)

* @return the Document

* @throws DomException

*/

public static Document createXmlDocument(String rootName) throws Exception {

DocumentBuilderFactory factory;

factory = DocumentBuilderFactory.newInstance();

factory.setNamespaceAware(false);

Document document = factory.newDocumentBuilder().newDocument();

Element root = document.createElement(rootName);

document.appendChild(root);

return document;

}

public static String documentToString(Document document) {

try {

TransformerFactory tf = TransformerFactory.newInstance();

Transformer trans = tf.newTransformer();

StringWriter sw = new StringWriter();

trans.transform(new DOMSource(document), new StreamResult(sw));

return sw.toString();

} catch (TransformerException tEx) {

tEx.printStackTrace();

}

return null;

}

}