[英]How can I concatenate a string within a loop in JSTL/JSP?
<c:forEach items="${myParams.items}" var="currentItem" varStatus="stat">
<c:set var="myVar" value="<c:out var="myVar" />" />
</c:forEach>
I want to concatenate the values of currentItem.myVar and output it at the end of the loop, problem is I can't figure out how to do this... 我想连接currentItem.myVar的值并在循环结束时输出它,问题是我无法弄清楚如何做到这一点......
(Preferably not using Java) (最好不要使用Java)
Perhaps this will work? 也许这会奏效吗?
<c:forEach items="${myParams.items}" var="currentItem" varStatus="stat">
<c:set var="myVar" value="${stat.first ? '' : myVar} ${currentItem}" />
</c:forEach>
You're using JSTL 2.0 right? 你正在使用JSTL 2.0吗? You don't need to put
<c:out/>
around all variables. 您不需要在所有变量周围放置
<c:out/>
。 Have you tried something like this? 你尝试过这样的事吗?
<c:forEach items="${myParams.items}" var="currentItem" varStatus="stat">
<c:set var="myVar" value="${myVar}${currentItem}" />
</c:forEach>
Edit : Beaten by the above 编辑 :被上述击败
是JSTL的join()
,你搜索的是什么?
<c:set var="myVar" value="${fn:join(myParams.items, ' ')}" />
define a String variable using the JSP tags 使用JSP标记定义String变量
<%!
String test = new String();
%>
then refer to that variable in your loop as 然后在循环中引用该变量
<c:forEach items="${myParams.items}" var="currentItem" varStatus="stat">
test+= whaterver_value
</c:forEach>
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