2019独角兽企业重金招聘Python工程师标准>>> 
Illegal use of <when>-style tag without <choose> as its direct parent这个错误一般是在jsp页面中非法使用<when>标签 该标签必须是<choose>标签的直接子标签 不能单独是<when>标签
下面给出一个例子
<c:choose> <c:when test="testCondition"> Content1 </c:when> <c:when test="testCondition"> Content2 </c:when> <c:otherwise> Content3 </c:otherwise>
</c:choose>
