0
我目前正在制作一个有8列的表格。首先，我检查值是否为空，如果不为空，则写出列的列标题（例如：“First Name：”）。接下来，我遍历一个列表，并使用适当的值填充每列，如果它不为空。我的问题是列标题（在下面的代码中的注释之间）不打印，而表中的实际数据打印。谁能帮我？jsp页面不显示表格列标题
<table style="width: 100%">
<c:choose>
<c:when test="${empty serviceRequests}">
</c:when>
<c:otherwise>
<tr> //DOES NOT PRINT STARTING FROM HERE
<td><c:choose>
<c:when test="${empty serviceRequestData['ID']}"></c:when>
<c:otherwise>
<u>ID:</u>
</c:otherwise>
</c:choose></td>
<td><c:choose>
<c:when test="${empty serviceRequestData['FN_Contact']}"></c:when>
<c:otherwise>
<u>First Name:</u>
</c:otherwise>
</c:choose></td>
<td><c:choose>
<c:when test="${empty serviceRequestData['LN_Contact']}"></c:when>
<c:otherwise>
<u>Last Name:</u>
</c:otherwise>
</c:choose></td>
<td><c:choose>
<c:when test="${empty serviceRequestData['Email']}"></c:when>
<c:otherwise>
<u>Email:</u>
</c:otherwise>
</c:choose></td>
<td><c:choose>
<c:when test="${empty serviceRequestData['FN_Reporter']}"></c:when>
<c:otherwise>
<u>Reporter First Name:</u>
</c:otherwise>
</c:choose></td>
<td><c:choose>
<c:when test="${empty serviceRequestData['LN_Reporter']}"></c:when>
<c:otherwise>
<u>Reporter Last Name:</u>
</c:otherwise>
</c:choose></td>
<td><c:choose>
<c:when test="${empty serviceRequestData['Company']}"></c:when>
<c:otherwise>
<u>Company:</u>
</c:otherwise>
</c:choose></td>
<td><c:choose>
<c:when test="${empty serviceRequestData['Notes']}"></c:when>
<c:otherwise>
<u>Notes:</u>
</c:otherwise>
</c:choose></td>
</tr> //DOES NOT PRINT ENDING HERE
<c:forEach var="serviceRequestData" items="${serviceRequests}">
<tr>
<td><c:choose>
<c:when test="${empty serviceRequestData['ID']}">
Null
</c:when>
<c:otherwise>
${serviceRequestData['ID']}
</c:otherwise>
</c:choose></td>
<td><c:choose>
<c:when test="${empty serviceRequestData['FN_Contact']}">
Null
</c:when>
<c:otherwise>
${serviceRequestData['FN_Contact']}
</c:otherwise>
</c:choose></td>
<td><c:choose>
<c:when test="${empty serviceRequestData['LN_Contact']}">
Null
</c:when>
<c:otherwise>
${serviceRequestData['LN_Contact']}
</c:otherwise>
</c:choose></td>
<td><c:choose>
<c:when test="${empty serviceRequestData['Email']}">
Null
</c:when>
<c:otherwise>
${serviceRequestData['Email']}
</c:otherwise>
</c:choose></td>
<td><c:choose>
<c:when test="${empty serviceRequestData['FN_Reporter']}">
Null
</c:when>
<c:otherwise>
${serviceRequestData['FN_Reporter']}
</c:otherwise>
</c:choose></td>
<td><c:choose>
<c:when test="${empty serviceRequestData['LN_Reporter']}">
Null
</c:when>
<c:otherwise>
${serviceRequestData['LN_Reporter']}
</c:otherwise>
</c:choose></td>
<td><c:choose>
<c:when test="${empty serviceRequestData['Company']}">
Null
</c:when>
<c:otherwise>
${serviceRequestData['Company']}
</c:otherwise>
</c:choose></td>
<td><c:choose>
<c:when test="${empty serviceRequestData['Notes']}">
Null
</c:when>
<c:otherwise>
${serviceRequestData['Notes']}
</c:otherwise>
</c:choose></td>
</tr>
</c:forEach>
</c:otherwise>
</c:choose>
</table>
你有一个选择在你的头......因此，你很可能结束在C：当条件，什么都不输出......尝试添加一些东西到C：当内容，看看它是否显示。 – scunliffe
是的我已经尝试添加'
BLAHBLAHBLAH
'并且头部没有打印 – GregH我刚刚发现它，您正在使用（在您的头文件测试中）之后在for循环中定义的变量（例如，它未定义然而） – scunliffe