从Java中的Document获取xml字符串

Question

I have a Java program aiming to consider an xml dom and write it into a string. I am using these packages: org.w3c.dom.* and javax.xml.parsers.*;

So I have DocumentBuilder , Document , Element objects...

Is there a way to get the string representing my xml dom in one call????

Answer 1

Its not one call but:

TransformerFactory transfac = TransformerFactory.newInstance();
Transformer trans = transfac.newTransformer();
trans.setOutputProperty(OutputKeys.METHOD, "xml");
trans.setOutputProperty(OutputKeys.INDENT, "yes");
trans.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", Integer.toString(2));

StringWriter sw = new StringWriter();
StreamResult result = new StreamResult(sw);
DOMSource source = new DOMSource(doc.getDocumentElement());

trans.transform(source, result);
String xmlString = sw.toString();

The setOutputProperty method makes the string output prettier so you can take it out.

Answer 2

String xmlString =  org.apache.ws.security.util.XMLUtils.PrettyDocumentToString(doc);

Answer 3

The method org.apache.axis.utils.XMLUtils.PrettyDocumentToString(Document) have a problem that includes white spaces in the tag values.

A solution is use the method org.apache.axis.utils.XMLUtils.DocumentToString(Document).

Answer 4

I'm also looking for a cheap and efficient way to serialize a DOM. Until now, I see only 2 options:

• JAXP transformations (something like Grammin)
• LSSerializer like here: http://xerces.apache.org/xerces2-j/faq-dom.html#faq-3 .

Maybe you can try the LSSerializer approach (but not in one call).