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Question

大家好我试图做一系列检查以连接两个我要减去和格式化的数字。这可能还是有替代方案？我在标题中得到了这个错误。感谢

        <td><fmt:formatNumber value='${'
        <c:choose>
        <c:when test="${columnB == 'MWS'}">'line.initialQS.quantities[0]'</c:when> 
        <c:when test="${columnB == 'SMC Unfunded'}">'line.expectedUnfundedQS.quantities[0]'</c:when>
        <c:when test="${columnB == 'SMC Funded'}">'line.expectedFundedQS.quantities[0]'</c:when>
        <c:when test="${columnB == 'MMC'}">'line.targetQS.quantities[0]'</c:when>
        <c:when test="${columnB == 'Current Scenario'}">'line.currentQS.quantities[0]'</c:when>
        <c:otherwise>
           </c:otherwise>
           </c:choose>
        ' - '
        <c:choose>
        <c:when test="${columnA == 'MWS'}">'line.initialQS.quantities[0]'</c:when> 
        <c:when test="${columnA == 'SMC Unfunded'}">'line.expectedUnfundedQS.quantities[0]'</c:when>
        <c:when test="${columnA == 'SMC Funded'}">'line.expectedFundedQS.quantities[0]'</c:when>
        <c:when test="${columnA == 'MMC'}">'line.targetQS.quantities[0]'</c:when>
        <c:when test="${columnA == 'Current Scenario'}">'line.currentQS.quantities[0]'</c:when>
        <c:otherwise>
       </c:otherwise>
       </c:choose>
        '}'
        type="number"  maxIntegerDigits='10' minFractionDigits='0' maxFractionDigits='2' groupingUsed='true' /></td>   

Answer 1

定义值的变量：

...
<c:when test="${columnB == 'MWS'}">
    <c:set var="bValue" value="${line.initialQS.quantities[0]}" />
</c:when>
...

然后进行计算或格式化：

<fmt:formatNumber value="${bValue - aValue}" type="number" maxIntegerDigits="10" minFractionDigits="0" maxFractionDigits="2" groupingUsed="true" />