Java and XSLT tutorial to transform XML documents
Q. What is XSLT?
A. XSLT (Extensible Stylesheet Language Transformations) is a language for transforming XML documents into other XML, HTML, or plain text documents. XSLT is based on functional prgramming ideas, but it is not a full functional programming language as it lacks ability to treat functions as a first class data type. XSLT supports XPath to query parts of XML. The major disadvantage of XSL is that it can be very verbose.
Step 1: The source XML
<Employee> <name type="first">Peter</name> <age>25</age> </Employee>
Step 2: The style sheet (i.e XSL) that defines how to transform
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
<xsl:template match="/Employee">
<HTML>
<HEAD>
<TITLE></TITLE>
</HEAD>
<BODY>
<H1>
Hello
<xsl:value-of select="name"/>
</H1>
</BODY>
</HTML>
</xsl:template>
</xsl:stylesheet>
Step 3: The Java code to perform the transformation by applying the above XSL.
package com.xml;
import java.io.ByteArrayInputStream;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
public class XsltTransform {
public static void main(String[] args) {
String xml = "<Employee><name type=\"first\">Peter</name><age>25</age></Employee>";
String xsl = "<xsl:stylesheet xmlns:xsl=\"http://www.w3.org/1999/XSL/Transform\" version=\"1.0\">\r\n" +
" <xsl:template match=\"/Employee\">\r\n" +
" <HTML>\r\n" +
" <HEAD>\r\n" +
" <TITLE></TITLE>\r\n" +
" </HEAD>\r\n" +
" <BODY>\r\n" +
" <H1>\r\n" +
" Hello \r\n" +
" <xsl:value-of select=\"name\"/>\r\n" +
" </H1>\r\n" +
" </BODY>\r\n" +
" </HTML>\r\n" +
"\r\n" +
" </xsl:template>\r\n" +
"</xsl:stylesheet>";
try {
Source xmlSource = new StreamSource(new ByteArrayInputStream(xml.getBytes()));
Source xslSource = new StreamSource(new ByteArrayInputStream(xsl.getBytes()));
Result result = new StreamResult(System.out);
TransformerFactory factory = TransformerFactory.newInstance();
Transformer transformer = factory.newTransformer(xslSource);
transformer.transform(xmlSource, result);
} catch (TransformerException e) {
e.printStackTrace();
}
}
}
Output:
<HTML>
<HEAD>
<META http-equiv="Content-Type" content="text/html; charset=UTF-8">
<TITLE></TITLE>
</HEAD>
<BODY>
<H1>
Hello
Peter</H1>
</BODY>
</HTML>
Labels: XML
posted by Unknown at
8/05/2014 10:33:00 AM
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