XSL can be used to define how an XML file should be displayed by transforming the XML file into a format such as HTML, PDF, etc..
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| Transforming an xml document to multiple views |
In this example, i am going to transform a simple XML file into HTML.
Input XML file looks like.
user.xml :
<?xml version="1.0" encoding="utf-8"?> <users> <user> <username>ganesh</username> <fname>Ganesh</fname> <lname>Tiwari</lname> <job>Software Developer</job> <address>Chitwan Nepal</address> </user> <user> <username>ramesh</username> <fname>Ramesh</fname> <lname>Tiwari</lname> <job></job> <address>Kathmandu Nepal</address> </user> <user> <username>Harihari</username> <fname>Hari</fname> <lname>Tiwari</lname> <job></job> <address>Kathmandu Nepal</address> </user> </users>
And my XSL File, which lists the xml content into a table.
user.xsl : <?xml version="1.0" encoding="iso-8859-1"?> <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:template match="/"> <html> <body> <h2>User Details</h2> <table border="1"> <tr bgcolor="#9acd32"> <th>FirstName</th> <th>LastName</th> <th>Job</th> <th>Address</th> </tr> <xsl:for-each select="users/user"> <tr> <td> <xsl:value-of select="fname" /> </td> <td> <xsl:value-of select="lname" /> </td> <td> <xsl:value-of select="job" /> </td> <td> <xsl:value-of select="address" /> </td> </tr> </xsl:for-each> </table> </body> </html> </xsl:template> </xsl:stylesheet>
Reusable class for XML-XSLT Transformation to Generate HTML:
It has three public methods with input parameter as File, String or byte array. In java we can simply use javax.xml.transform package as XSL Processor.
public class XmlTransform {
public static String getTransformedHtml(File xmlFile, File xsltFile) throws TransformerException {
byte[] xml = getStringFromFile(xmlFile).getBytes();
byte[] xsl = getStringFromFile(xsltFile).getBytes();
return getTransformedHtml(xml, xsl);
}
public static String getTransformedHtml(String xml, String xsl) throws TransformerException {
return getTransformedHtml(xml.getBytes(), xsl.getBytes());
}
public static String getTransformedHtml(byte[] xml, byte[] xsl) throws TransformerException {
Source srcXml = new StreamSource(new ByteArrayInputStream(xml));
Source srcXsl = new StreamSource(new ByteArrayInputStream(xsl));
StringWriter writer = new StringWriter();
Result result = new StreamResult(writer);
TransformerFactory tFactory = TransformerFactory.newInstance();
Transformer transformer = tFactory.newTransformer(srcXsl);
transformer.transform(srcXml, result);
return writer.toString();
}
private static String getStringFromFile(File f) {
StringBuilder sb = new StringBuilder(1000);
try {
Scanner sc = new Scanner(f);
while (sc.hasNext()) {
sb.append(sc.nextLine());
}
} catch (FileNotFoundException e) {
e.printStackTrace();
}
return sb.toString();
}
}
The test class
public class TestXsl {
public static void main(String[] args) throws TransformerException {
final File xmlFile = new File("user.xml");
final File xsltFile = new File("user.xsl");
System.out.println(XmlTransform.getTransformedHtml(xmlFile, xsltFile));
}
}
The generated HTML:
<html>
<body>
<h2>User Details</h2>
<table border="1">
<tr bgcolor="#9acd32">
<th>FirstName</th><th>LastName</th><th>Job</th><th>Address</th>
</tr>
<tr>
<td>Ganesh</td><td>Tiwari</td><td>Software Developer</td><td>Chitwan Nepal</td>
</tr>
<tr>
<td>Ramesh</td><td>Tiwari</td><td></td><td>Kathmandu Nepal</td>
</tr>
<tr>
<td>Hari</td><td>Tiwari</td><td></td><td>Kathmandu Nepal</td>
</tr>
</table>
</body>
</html>
The HTML view of generated HTML:
User Details
| FirstName | LastName | Job | Address |
|---|---|---|---|
| Ganesh | Tiwari | Software Developer | Chitwan Nepal |
| Ramesh | Tiwari | Kathmandu Nepal | |
| Hari | Tiwari | Kathmandu Nepal |
java code needs working on... e.g. System.out.println(XmlTransform.getTransformedHtml(xmlFile, xsltFile)); :)
ReplyDeleteThanks a lot
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