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The <x:param> tag is used together with the <x:transform> tag to set parameters for the XSLT stylesheet.
<x:param name="<string>" value="<string>"/>
The <x:param> tag has the following attributes:
| Attribute | Description | Is required | Default value |
|---|---|---|---|
| name | XSLT parameter name | Yes | Body |
| value | XSLT parameter value | No | None |
style.xsl file code is as follows, using xsl:param... tag with {$bgColor} variable:
<?xml version="1.0"?>
<xsl:stylesheet xmlns:xsl=
"http://www.w3.org/1999/XSL/Transform" version="1.0">
<xsl:output method="html" indent="yes"/>
<xsl:param name="bgColor"/>
<xsl:template match="/">
<html>
<body>
<xsl:apply-templates/>
</body>
</html>
</xsl:template>
<xsl:template match="books">
<table border="1" width="50%" bgColor="{$bgColor}">
<xsl:for-each select="book">
<tr>
<td>
<i><xsl:value-of select="name"/></i>
</td>
<td>
<xsl:value-of select="author"/>
</td>
<td>
<xsl:value-of select="price"/>
</td>
</tr>
</xsl:for-each>
</table>
</xsl:template>
</xsl:stylesheet>mian.jsp file code is as follows, using x:param tag within x:transform tag:
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="x" uri="http://java.sun.com/jsp/jstl/xml" %>
<html>
<head>
<title>JSTL x:param Tag</title>
</head>
<body>
<h2>Books Info:</h2>
<c:set var="xmltext">
<books>
<book>
<name>Padam History</name>
<author>ZARA</author>
<price>100</price>
</book>
<book>
<name>Great Mistry</name>
<author>NUHA</author>
<price>2000</price>
</book>
</books>
</c:set>
<c:import url="http://localhost:8080/style.xsl" var="xslt"/>
<x:transform xml="${xmltext}" xslt="${xslt}">
<x:param name="bgColor" value="grey">/>
</x:transform>
</body>
</html>The running result is as follows: