JSTL XML x:set Tag

The <x: set> tag is used to store the result of xml path expression in scoped variable.

Syntax of <x: set> Tag

[code lang=”html”]
<x: set attributes/>
[/code]

Example

[code lang=”html”]
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="x" uri="http://java.sun.com/jsp/jstl/xml" %>

<h3>Fruits Information:</h3>

<c:set var="fruit">

<fruit>
<name>Grapes</name>
<price>40/kg</price>
</fruit>

<fruit>
<name>Orange</name>
<price>30/kg</price>
</fruit>

<fruit>
<name>Apple</name>
<price>90/kg</price>
</fruit>

</fruits>

</c:set>

<x:parse xml="${fruit}" var="output"/>
<x:set var="fragment" select="$output/fruits/fruit[3]/price"/>

<b>The price of the Apple</b>:
<x:out select="$fragment" />

</body>
</html>
[/code]

Details of the Code

<c:set var=”fruit”> tag is used to set the variable name which we want to display in the output.
<x:parse xml=”${fruit}” var=”output”/> tag is used to parse the xml content and the result is been stored in specified variable.
<x:set var=”fragment” select=”$output/fruits/fruit[3]/price”/> tag is used to store the result in xml path expression using the attribute var and select.
<x:out select=”$output/fruits/fruit[3]/price” /> tag is used to display the price of the particular fruit which we want.

Steps for ExecutionBefore executing the xml programs we should add jar files in eclipse namely:
xalan-2.7.0.jar

OutputThe below is screen shot of the output.

Attributes	Description
select	To evaluate the particular object it specifies xml Xpath expression.
var	It specifies the variable name which stores parse xml document.
scope	The Scope into which the variable attribute has to be set.

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