일하다가 이것때문에 시간을 마니 잡아먹어서 기억할 겸 메모한다.
처음에는 org.apache.xerces.dom.DocumentImpl와 org.w3c.dom.Document, DOMImplementationRegistry, DOMImplementationLS 를 사용했는데(how-can-i-build-an-html-org-w3c-dom-document),
라이브러리가 꼬여서 다른방법이 없나 찾아보다가 DocumentBuilder,TransformerFactory를 사용하는 방법으로 구현했다.

import java.io.StringWriter;

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 CustomTest {

	public CustomTest() {
		
	}
	public String makeElement() {
		StringBuffer sb = new StringBuffer();
		
		DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
		DocumentBuilder builder = null;
		try {
			builder = factory.newDocumentBuilder();
		} catch (ParserConfigurationException e) {
			e.printStackTrace();
		}
		Document htmlDoc = builder.newDocument();
        Element ulElement = htmlDoc.createElement("ul");
        Element liElement = htmlDoc.createElement("li");  
        Element aElement = htmlDoc.createElement("a");
        aElement.setAttribute("href", "#none");
    	aElement.setTextContent("Test");
    	liElement.appendChild(aElement);
    	ulElement.appendChild(liElement);
        TransformerFactory transFactory = TransformerFactory.newInstance();
        Transformer transformer =null;
        StringWriter buffer = null;
		try {
			transformer = transFactory.newTransformer();
			buffer = new StringWriter();
			transformer.setOutputProperty(OutputKeys.INDENT, "yes");
	        transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
	        transformer.transform(new DOMSource(ulElement),
				      new StreamResult(buffer));
		} catch (TransformerConfigurationException e1) {
			// TODO Auto-generated catch block
			e1.printStackTrace();
		} catch (TransformerException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
       
        sb.append(buffer);
		return sb.toString();
		
	}
	
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		CustomTest cm = new CustomTest();
		System.out.println("start!!");
		//StringBuffer sb = new StringBuffer();
		//sb.append(menu.getHtmlHelpPage(""));
		System.out.print(cm.makeElement());
	}

}

결과:

<ul>
<li>
<a href=”#none”>Test</a>
</li>
</ul>