Java 将XML文档转换为字符串？

我已经摆弄了20多分钟，我的Google foo让我失望了

假设我有一个用Java创建的XML文档（org.w3c.dom.Document）：

DocumentBuilderFactory docFactory=DocumentBuilderFactory.newInstance（）；
DocumentBuilder docBuilder=docFactory.newDocumentBuilder（）；
Document Document=docBuilder.newDocument（）；
Element rootElement=document.createElement（“rootElement”）；
元素childElement=document.createElement（“childElement”）；
appendChild（document.createTextNode（“子文本”））；
appendChild（childElement）；
document.appendChild（rootElement）；
String documentConvertedToString=“？”/您可以使用这段代码来完成您想要的：

public static String getStringFromDocument(Document doc) throws TransformerException {
    DOMSource domSource = new DOMSource(doc);
    StringWriter writer = new StringWriter();
    StreamResult result = new StreamResult(writer);
    TransformerFactory tf = TransformerFactory.newInstance();
    Transformer transformer = tf.newTransformer();
    transformer.transform(domSource, result);
    return writer.toString();
}

您是否习惯于使用
org.w3c.dom
？其他domapi（Dom4j、JDOM、XOM）使这类事情变得非常简单。
public static String toString(Document doc) {
    try {
        StringWriter sw = new StringWriter();
        TransformerFactory tf = TransformerFactory.newInstance();
        Transformer transformer = tf.newTransformer();
        transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "no");
        transformer.setOutputProperty(OutputKeys.METHOD, "xml");
        transformer.setOutputProperty(OutputKeys.INDENT, "yes");
        transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");

        transformer.transform(new DOMSource(doc), new StreamResult(sw));
        return sw.toString();
    } catch (Exception ex) {
        throw new RuntimeException("Error converting to String", ex);
    }
}

public static String getStringFromDocument(Document doc) throws TransformerException {
    DOMSource domSource = new DOMSource(doc);
    StringWriter writer = new StringWriter();
    StreamResult result = new StreamResult(writer);
    TransformerFactory tf = TransformerFactory.newInstance();
    Transformer transformer = tf.newTransformer();
    transformer.transform(domSource, result);
    return writer.toString();
}