Java JSP for-each 标签中的逗号分隔值

声明:本页面是StackOverFlow热门问题的中英对照翻译,遵循CC BY-SA 4.0协议,如果您需要使用它,必须同样遵循CC BY-SA许可,注明原文地址和作者信息,同时你必须将它归于原作者(不是我):StackOverFlow 原文地址: http://stackoverflow.com/questions/18784501/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me): StackOverFlow

提示:将鼠标放在中文语句上可以显示对应的英文。显示中英文
时间:2020-08-12 11:02:17  来源:igfitidea点击:

Comma separated values within JSP for-each tag

javajspjstl

提问by blackpanther

I am trying to get a JSTL <c:forEach>tag to work so that it would print a list of names as follows:

我试图让一个 JSTL<c:forEach>标签工作,以便它打印一个名称列表,如下所示:

Best, Milo, Kane

My code is as follows:

我的代码如下:

<c:forEach items="${persons}" var="person">
    ${person.name}, 
</c:forEach>

However, on the last person/name, a comma is inserted at the end, e.g.

但是,在最后一个人/姓名上,在末尾插入一个逗号,例如

Best, Milo, Kane,

How can I avoid the last comma in the loop?

如何避免循环中的最后一个逗号?

采纳答案by Reimeus

You could use LoopTagStatus#isLast

你可以用 LoopTagStatus#isLast

<c:forEach items="${persons}" var="person" varStatus="loop">
    ${person.name}
   <c:if test="${!loop.last}">,</c:if>
</c:forEach>

A simpler solution is to use a conditional operatorwithin ELinstead of the iftag

一个简单的办法是使用条件运算符EL,而不是的if标签

${!loop.last ? ',' : ''}