Illegal use of <when>-style tag without <choose> as its direct parent

报错信息：

javax.servlet.jsp.JspTagException: Illegal use of <when>-style tag without <choose> as its direct parent

<c:choose>    <c:when test=”${people.age<18 }”>        <h2>小于18</h2>    </c:when>    <c:when test=”${people.age=18 }”>        <h2>等于18</h2>    </c:when>    <c:otherwise>        <h2>大于18</h2>    </c:otherwise></c:choose>

少了<c:chosse>标签