<p>42: Encountered illegal body of tag "c:set" tag, given its attributes.</p>

<c:set>标签使用错误！！！

如题，使用c:set标签时遇到的问题，找了很多资料，最后还是google靠谱点...英语的，我就翻译了下。

c:set标签定义了value值时不能再有body，比如：

<c:set var="pid" scope="page" value="$('#projectName option:selected').val()">  <input /></c:set>

此时因为有定义value属性了，再加input标签，c:set就会报错。原文如下：

The answer of @BalusC is not totally correct. You ARE allowed to have contents in a<c:set>-tag. You are however, not allowed, to have contents in a <c:set>-tag when it already contains the attribute value="". (Which makes sense, as the JSP interpreter does not know what to set when both are present)。