The <x: if> tag evaluates an XPath expression. If the result is true then the body of the tag is evaluated, otherwise not. It is used to check the conditional value.
Syntax of <x: if> Tag
<x: if attributes> body content </x: if>
Attributes of <x: if> Tag
Attributes | Description |
select | To evaluate the particular object it specifies xml Xpath expression. |
var | It specifies the variable name which stores conditional result. |
scope | The Scope into which the variable attribute has to be set. |
Example
<%@ 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> x:if Tags</title> </head> <body> <h2>Fruits Information:</h2> <c:set var="fruitss"> <fruits> <fruit> <name>Grapes</name> <price>40</price> </fruit> <fruit> <name>Orange</name> <price>30</price> </fruit> <fruit> <name>Apple</name> <price>90</price> </fruit> </fruits> </c:set> <x:parse xml="${fruitss}" var="output"/> <x:if select="$output/fruits/fruit/price < 100"> Fruits prices are very low </x:if> </body> </html>
Details of the Code
- <c:set var=”fruitss”> tag is used to set the variable name which we want to display in the output.
- <x:parse xml=”${fruitss}” var=”output”/> tag is used to parse the xml content and the result is been stored in specified variable.
- <x:if select=”$output/fruits/fruit/price tag is used to test the condition.
Steps for Execution
Before executing the xml programs we should add jar files in eclipse namely:
xalan-2.7.0.jar
- Save this file as example.jsp in your eclipse IDE.
- Now select this jsp file, right mouse click and select Run as ->Run on server
Output
When the execution process is completed successfully we will get the following output :
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