樓主最近遇到一個要在js中寫多條件的條件判斷語句其中有個條件是類似於這種0<${aphot.count}<=5,樓主一開始是這麼寫的但是隻進入第一個和最後一個

<c:forEach items="${listAp}" var="aphot">
alert("ap資訊==>"+${aphot.id}+":"+${aphot.count});
<c:if test="${aphot.count == 0}">
alert("等於0");
</c:if>
<c:if test="${aphot.count>0} && ${aphot.count<=5}">
alert("0-5 :"+${aphot.xValue}+","+${aphot.yValue});
</c:if>
<c:if test="${aphot.count>5} && ${aphot.count<=10}">
alert("5-10:"+${aphot.xValue}+","+${aphot.yValue});
</c:if>
<c:if test="${aphot.count >10}">
alert("10以上:"+${aphot.xValue}+","+${aphot.yValue});
</c:if>
</c:forEach>
 

最後改成這樣子每個條件都可以進去,後來發現像這種語句只用寫一個“${}”符號，然後再一個裡面做判斷就行。

<c:forEach items="${listAp}" var="aphot">
alert("ap資訊==>"+${aphot.id}+":"+${aphot.count});
<c:if test="${aphot.count == 0}">
alert("等於0");
</c:if>
<c:if test="${aphot.count>0 && aphot.count<=5}">
alert("0-5 :"+${aphot.xValue}+","+${aphot.yValue});
</c:if>
<c:if test="${aphot.count>5 && aphot.count<=10}">
alert("5-10:"+${aphot.xValue}+","+${aphot.yValue});
</c:if>
<c:if test="${aphot.count >10}">
alert("10以上:"+${aphot.xValue}+","+${aphot.yValue});
</c:if>
</c:forEach>