我如何使以下代码起作用？

        <c:if test="${null != searchResults}" >
            <c:forEach items="${searchResults}" var="result" varStatus="status">

我已经尝试了许多不同的变化，例如：

<c:if test="${searchWasPerformed}" >

要么

<c:if test="<%=request.getAttribute("searchWasPerformed") %>" >

乃至

<% boolean b = null != request.getAttribute("searchResults"); %>
    <c:if test="${b}" >

看起来真的很丑：/但我继续

org.apache.jasper.JasperException: /WEB-INF/jsp/admin/admin-index.jsp(29,2) PWC6236: According to TLD or attribute directive in tag file, attribute test does not accept any expressions

我将如何解决？