<%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn" %>
<c:set var="string1" value="This is first String."/><c:if test="${fn:indexOf(string1,'first')!='-1'}">1</c:if>
转载于:https://www.cnblogs.com/yanjunwu/p/3222838.html
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