为何显示不了等级
<form action="test.jsp" method="post">
<input type="text" name="socre" value="${param.score}">
<input type="submit" value="提交">
</form>
<c:choose>
<c:when test="${param.score>=90 && param.score<=100}">
<c:out value="你的成绩为 A"></c:out>
</c:when>
<c:when test="${param.score>=80 && param.score<90}">
<c:out value="你的成绩为 B"></c:out>
</c:when>
<c:when test="${param.score>=70 && param.score<80}">
<c:out value="你的成绩为 C"></c:out>
</c:when>
<c:when test="${param.score>=60 && param.score<70}">
<c:out value="你的成绩为 D"></c:out>
</c:when>
<c:when test="${param.score>=0 && param.score<60}">
<c:out value="你的成绩为 E"></c:out>
</c:when>
<c:otherwise>
<c:out value="error"></c:out>
</c:otherwise>
</c:choose>