Re: Effecient way of creating XML

"Mike Schilling" <>
Fri, 1 Oct 2010 20:53:13 -0700
"Christian" <> wrote in message

Am 01.10.2010 06:15, schrieb Mike Schilling:

"Christian" <> wrote in message

Am 28.09.2010 20:06, schrieb Lew:

Christian wrote:

Try using SAX ...

Don't do string concatenation ...
SAX should achieve fairly high speeds ... only try to hack something
together if SAX is not fast enough!

SAX is mostly for parsing XML, not writing it.


I do use it for both.
It works pretty much both ways.

Do you mean that you generate SAX events and feed them into a
Transformer? I don't know how else you'd do that.

I am using the classes of SAX for generation..

e.g. writing one element:
public void writeToXML(TransformerHandler hd,AttributesImpl atts) throws
SAXException {
 atts.addAttribute("", "", "Name", "CDATA", filename);
 atts.addAttribute("", "", "Size", "CDATA", Long.toString(size));
 atts.addAttribute("", "", "TTH", "CDATA", tth.toString());
 hd.startElement("", "", "File", atts);
 //here could be more other elements...
 hd.endElement("", "", "File");

And before being able to write elements one has to create the

StreamResult streamResult = new StreamResult(out);
SAXTransformerFactory tf = (SAXTransformerFactory) SAXTransformerFactory

TransformerHandler hd = tf.newTransformerHandler();
Transformer serializer = hd.getTransformer();
serializer.setOutputProperty(OutputKeys.ENCODING, "utf-8");
serializer.setOutputProperty(OutputKeys.INDENT, "yes");
serializer.setOutputProperty(OutputKeys.VERSION, "1.0");
serializer.setOutputProperty(OutputKeys.STANDALONE, "yes");
//here write root element and all other elements..

Quite simple... and all doable with Java's build in classes in the SAX

More or less what I thought (transforming SAX events), and very nicely
packaged. Thanks.

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