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XML + XSL => HTML

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Problem

You have an XML file with an XSL and you want to combine them to an HTML page.

Solution

The necessary imports:

import java.io.InputStream;
import java.io.PrintStream;
import java.io.StringWriter;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;

Here out is the the System.out, so the result is sent to the stdout:

public static void xslTransformToStdout(InputStream xmlIn, InputStream xslIn, PrintStream out)
{
    StreamSource xml = new StreamSource(xmlIn);
    StreamSource xsl = new StreamSource(xslIn);

    StreamResult result = new StreamResult(out);

    TransformerFactory tFactory = TransformerFactory.newInstance();
    try {
        Transformer transformer = tFactory.newTransformer(xsl);
        transformer.transform(xml, result);
    } catch (javax.xml.transform.TransformerException te) {
        System.err.println("Transformer Error in xslTranform: "+te.getMessage());
    }
}

Here the resulting HTML is sent back as a String:

public static String xslTransformToString(InputStream xmlIn, InputStream xslIn)
{
    StringWriter sw = new StringWriter();

    StreamSource xml = new StreamSource(xmlIn);
    StreamSource xsl = new StreamSource(xslIn);

    StreamResult result = new StreamResult(sw);

    TransformerFactory tFactory = TransformerFactory.newInstance();
    try {
        Transformer transformer = tFactory.newTransformer(xsl);
        transformer.transform(xml, result);
    } catch (javax.xml.transform.TransformerException te) {
        System.err.println("Transformer Error in xslTranform: "+te.getMessage());
    }

    return sw.toString();
}