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Editorial Team
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Asked: 2026-05-31T05:45:18+00:00

I am trying to manually set values of variables using jstl syntax. <c:set var=var1

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I am trying to manually set values of variables using jstl syntax.

 <c:set var="var1" value="2"/>  
 <c:set var="var2" value="2"/>
 <c:set var="var3" value="2"/>
 <c:set var="var4" value="2"/>
 <c:set var="var5" value="2"/>
 <c:set var="var6" value="2"/>

The above syntax works.. But I am curious as to why the below syntax does not.

<c:forEach var="myVar" start="1" end="6">
 <c:set var="Display${myVar}" value="2"/>
</c:forEach>

Why cant we set variable names dynamically in jstl unlike other languages. Is there a smarter way?

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1 Answer

  1. Editorial Team

    Here a working code example:

    <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>

<html>
    <%
        Map myMap = new HashMap();
        pageContext.setAttribute("theMap", myMap);
    %>
    <c:set target="${theMap}" property="aKey" value="value for a key" />
    <c:set target="${theMap}" property="otherKey" value="value for other key" />

    Map content: ${theMap}
</html>

    Result:
    result
    This example uses the page context/scope, which is the default. Of course all contexts/scopes available (page, request, session, application) can be used, if needed.

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