使用 JSTLforEvery 循环的 varStatus 作为 ID

我想使用来自 JSTLforEvery 循环的计数，但是我的代码似乎不起作用。

<c:forEach items="${loopableObject}" var="theObject" varStatus="theCount">
<div id="divIDNo${theCount}">
</div>
</c:forEach>

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<div id="divIDNojavax.servlet.jsp.jstl.core.LoopTagSupport$1Status@5570e2" >

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最佳答案

The variable set by varStatus is a LoopTagStatus object, not an int. Use:

<div id="divIDNo${theCount.index}">

To clarify:

${theCount.index} starts counting at 0 unless you've set the begin attribute
${theCount.count} starts counting at 1

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You can try this. similar result

 <c:forEach items="${loopableObject}" var="theObject" varStatus="theCount">
<div id="divIDNo${theCount.count}"></div>
</c:forEach>

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Its really helped me to dynamically generate ids of showDetailItem for the below code.

<af:forEach id="fe1" items="#{viewScope.bean.tranTypeList}" var="ttf" varStatus="ttfVs" >
<af:showDetailItem  id ="divIDNo${ttfVs.count}" text="#{ttf.trandef}"......>

if you execute this line <af:outputText value="#{ttfVs}"/> prints the below:

{index=3, count=4, last=false, first=false, end=8, step=1, begin=0}

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you'd use any of these:

JSTL c:forEach varStatus properties

Property Getter Description

current getCurrent() The item (from the collection) for the current round of iteration.
index getIndex() The zero-based index for the current round of iteration.
count getCount() The one-based count for the current round of iteration
first isFirst() Flag indicating whether the current round is the first pass through the iteration
last isLast() Flag indicating whether the current round is the last pass through the iteration
begin getBegin() The value of the begin attribute
end getEnd() The value of the end attribute
step getStep() The value of the step attribute