Use of tag of JSTL

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Use of tag of JSTL

In this section we will learn how to use tag of Xml tag library of Jstl. This tag is used to perform conditional operations marked by and tags.

In this section we will learn how to use tag of Xml tag library of Jstl. This tag is used to perform conditional operations marked by and tags.

Use of <x:choose> tag of JSTL

     

In this section we will learn how to use <x:choose> tag of Xml tag library of Jstl. This tag is used to perform conditional operations marked by <when> and <otherwise> tags. 

<x:when> is used to match given condition in 'select' attribute. If found true execute the statement given in this tag.
<x:otherwise> If found condition false given <x:when> tag, execute tag <x:otherwise>.

 

 

 

 

 

Standard Syntax : <%@ taglib prefix="x" uri="http://java.sun.com/jsp/jstl/xml" %>

Attributes of <x:when> Tag 
select   Defines xPath expression.

choose_xmlJstlTag.jsp

<%@ taglib prefix="x" uri="http://java.sun.com/jsp/jstl/xml" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
    <head>
        <title>Example x:if tag of JSTL</title>
    </head>
    <body>        
        <c:import var="import" url="employee.xml" />
        <x:parse var="doc" doc="${import}" />
        <table border="1">
            <tr>
            <th>Employee Name</th>
            <th>Promotion </th>
            <x:forEach var="emp" select="$doc/org/company/emp" >
                <tr>
                    <td><x:out select="$emp/name" /> </td>
                    <td>
                        <x:choose>                       
                            <x:when select="$emp/age>23">
                                One month<br>            
                            </x:when>                           
                            <x:otherwise>                
                                Not eligible<br>         
                            </x:otherwise>               
                        </x:choose>                                 
                    </td>
                </tr>
            </x:forEach>
        </table>
    </body>
</html>

Output :


 
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