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我目前正在製作一個有8列的表格。首先，我檢查值是否爲空，如果不爲空，則寫出列的列標題（例如：「First Name：」）。接下來，我遍歷一個列表，並使用適當的值填充每列，如果它不爲空。我的問題是列標題（在下面的代碼中的註釋之間）不打印，而表中的實際數據打印。誰能幫我？jsp頁面不顯示錶格列標題
<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>
你有一個選擇在你的頭......因此，你很可能結束在C：當條件，什麼都不輸出......嘗試添加一些東西到C：當內容，看看它是否顯示。 – scunliffe
是的我已經嘗試添加'
BLAHBLAHBLAH
'並且頭部沒有打印 – GregH我剛剛發現它，您正在使用（在您的頭文件測試中）之後在for循環中定義的變量（例如，它未定義然而） – scunliffe