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❮ Jstl Format Bundle Tag Jstl Function Split ❯

<x:if> Tag

JSP Standard Tag Library

The <x:if> tag is used to evaluate the value of an XPath expression. If the value is true, it executes the content within its body; if false, the content of its body is ignored.

Syntax

&lt;x:if
  select="<string>"
  var="<string>"
  scope="<string>">   
   ...
</x:if>

Attributes

The <x:if> tag has the following attributes:

Attribute Description Required Default Value
select The XPath expression to be evaluated Yes None
var The variable to store the condition result No None
scope The scope of the var attribute No Page

Example

The following example demonstrates how to use the <x:if> 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:if Tag</title>
</head>
<body>
<h3>Books Info:</h3>

&lt;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>

&lt;x:parse xml="${xmltext}" var="output"/>

&lt;x:if select="$output//book">
   Document has at least one <book> element.
</x:if>
<br />
&lt;x:if select="$output/books[1]/book/price > 100">
   Book prices are very high
</x:if>

</body>
</html>

The output is as follows:

BOOKS INFO:
Document has at least one <book> element. 
Book prices are very high

JSP Standard Tag Library

❮ Jstl Format Bundle Tag Jstl Function Split ❯