Java DOM创建xml document，domxml,import org.w

Java DOM创建xml document，domxml,import org.w

import org.w3c.dom.*;import javax.xml.parsers.*;import javax.xml.transform.*;import javax.xml.transform.stream.*;import javax.xml.transform.dom.*;public class TestDOM {  public TestDOM() { }    public String doit()      throws javax.xml.parsers.ParserConfigurationException,             javax.xml.transform.TransformerException,             javax.xml.transform.TransformerConfigurationException{        DocumentBuilderFactory factory          = DocumentBuilderFactory.newInstance();        DocumentBuilder builder = factory.newDocumentBuilder();        DOMImplementation impl = builder.getDOMImplementation();        Document doc = impl.createDocument(null,null,null);        Element e1 = doc.createElement("howto");        doc.appendChild(e1);        Element e2 = doc.createElement("java");        e1.appendChild(e2);        e2.setAttribute("url","http://www.rgagnon.com/howto.html");        // transform the Document into a String        DOMSource domSource = new DOMSource(doc);        TransformerFactory tf = TransformerFactory.newInstance();        Transformer transformer = tf.newTransformer();        //transformer.setOutputProperty            (OutputKeys.OMIT_XML_DECLARATION, "yes");        transformer.setOutputProperty(OutputKeys.METHOD, "xml");        transformer.setOutputProperty(OutputKeys.ENCODING,"ISO-8859-1");        transformer.setOutputProperty            ("{http://xml.apache.org/xslt}indent-amount", "4");        transformer.setOutputProperty(OutputKeys.INDENT, "yes");        java.io.StringWriter sw = new java.io.StringWriter();        StreamResult sr = new StreamResult(sw);        transformer.transform(domSource, sr);        String xml = sw.toString();        return xml;    }    public static void main(String args[])      throws javax.xml.parsers.ParserConfigurationException,             javax.xml.transform.TransformerException,             javax.xml.transform.TransformerConfigurationException{        System.out.println(new TestDOM().doit());        /*          output :          <?xml version="1.0" encoding="ISO-8859-1"?>          <howto>          <java url="http://www.ragagnon.com/howto.html"/>          </howto>        /*     }}