The <x: set> tag is used to store the result of xml path expression in scoped variable.
Syntax of <x: set> Tag
<x: set attributes/>
Attributes of <x: set> Tag
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>JSTL Tags</title>
</head>
<body>
<h3>Fruits Information:</h3>
<c:set var="fruit">
<fruits>
<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="$fragment" />
</body>
</html>
Details of the Code
- <c:set var=”fruit”> tag is used to set the variable name which we want to display in the output.
- <x:parse xml=”${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
- 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
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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JSTL XML x:if Tag