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Editorial Team
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Asked: 2026-05-14T00:21:42+00:00

i Want to import a given css or javascript file depending os some conditions,

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i Want to import a given css or javascript file depending os some conditions, in my Servlet i have:


protected void doPost(...)
{
   if(condition)
   {
     //import some javascript or css file here
   }

}

I need this behavior since i have too many files to import and the files name may vary according to the condition.
Is it possible?

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1 Answer

  1. Editorial Team

    Sort of, yes.

    boolean condition = evaluateItSomehow();
request.setAttribute("condition", condition);
request.getRequestDispatcher("/WEB-INF/page.jsp").forward(request, response);

    Then in page.jsp using JSTL c:if:

    <head>
    <c:if test="${condition}">
        <link rel="stylesheet" type="text/css" href="style.css">
        <script type="text/javascript" src="script.js"></script>
    </c:if>
    ...
</head>

    Update: since you seem to have more than one files for this, you can even make it more flexible by just setting the desired filename suffix (or prefix, or even the entire name, what you like):

    String suffix = evaluateItSomehow();
request.setAttribute("suffix", suffix);
request.getRequestDispatcher("/WEB-INF/page.jsp").forward(request, response);

    and

    <head>
    <link rel="stylesheet" type="text/css" href="style_${suffix}.css">
    <script type="text/javascript" src="script_${suffix}.js"></script>
    ...
</head>

    If you set suffix to for example "foo", this will load style_foo.css and script_foo.js. I think this gives enough new insights.

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