問題描述：使用c:choose時，域對象獲取的值的類型不一致時，報錯（org.apache.jasper.JasperException：在第[24]行處理JSP頁面[/zh_en.jsp]時發生異常）
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<title>星期中英對照</title>
</head>
<body>
<%
request.setAttribute("day", "m");
%>
${day}
<c:choose>
<c:when test="${day == 'm'}">//注意這里 "${day == \"m\"}"
<p>星期一</p>
</c:when>
<c:when test="${day == 2}">
<p>星期二</p>
</c:when>
<c:when test="${day == 3}">
<p>星期三</p>
</c:when>
<c:when test="${day == 4}">
<p>星期四</p>
</c:when>
<c:when test="${day == 5}">
<p>星期五</p>
</c:when>
<c:when test="${day == 6}">
<p>星期六</p>
</c:when>
<c:when test="${day == 7}">
<p>星期天</p>
</c:when>
<c:otherwise>
<p style="color: #f20d0d;">內容不對喲</p>
</c:otherwise>
</c:choose>
</body>
</html>
注意：類型
