Question

For some reason my below code gives the exception: javax.xml.transform.TransformerConfigurationException: Could not compile stylesheet

public String removePrettyPrint(String xml) throws TransformerException, TransformerFactoryConfigurationError {
    String result = "";
    TransformerFactory factory = TransformerFactory.newInstance();
    String source = "<?xml version=\"1.0\"?><xsl:stylesheet version=\"1.0\" xmlns:xsl=\"http://www.w3.org/1999/XSL/Transform\">    <xsl:output indent=\"no\" />    <xsl:template match=\"@*|node()\">        <xsl:copy>            <xsl:apply-templates select=\"@*|node()\"/>        </xsl:copy>    </xsl:template></xsl:stylesheet>";
    Source xslt = new StreamSource(source);
    Transformer transformer = factory.newTransformer(xslt);
    Source text = new StreamSource(xml);
    transformer.transform(text, new StreamResult(result));
    return result;
}

What is wrong with it?

Answer 1

I think the problem is that when you pass a string as a parameter to the StreamSource, it expects it to be a URL of an XML document, not the actual XML string itself.

You probably need to use a StringReader reader here:

String source = "...XSL Here...";
StringReader xsltReader = new StringReader(source);
Source xslt = new StreamSource(xsltReader);
Transformer transformer = factory.newTransformer(xslt);

You’ll probably have to do the same for the XML, assuming you are passing in XML, and not the URL to an XML document.

StringReader xmlReader = new StringReader(xml);
Source text = new StreamSource(xmlReader);

And for the transform itself, you may need to make use of a StringWriter

StringWriter writer = new StringWriter();
transformer.transform(text, new StreamResult(writer));
result = writer.toString();