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The <x:set> tag sets a variable to the value of an XPath expression.
If the XPath expression results in a boolean, <x:set> sets a java.lang.Boolean object; for a string, java.lang.String; and for a number, java.lang.Number.
The <x:set> tag has following attributes:
Attribute | Description | Required | Default |
---|---|---|---|
var | A variable that is set to the value of the XPath expression | Yes | Body |
select | The XPath expression to be evaluated | No | None |
scope | Scope of the variable specified in the var attribute | No | Page |
Following example to show you a usage of <x:set> tag:
<%@ 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 Tags</title> </head> <body> <h3>Books Info:</h3> <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> <x:parse xml="${xmltext}" var="output"/> <x:set var="fragment" select="$output//book"/> <b>The price of the second book</b>: <c:out value="${fragment}" /> </body> </html> |
Now let us try to access above JSP, this would produce following result:
Books Info:The price of the second book:[[book: null], [book: null]] |
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