问题
What is the difference, if any, between the keyword 'eq' and the operator '==' in JSP Expression Language?
In code, what is the difference between:
<c:if test="${var1 eq var2}">some code</c:if>
and
<c:if test="${var1 == var2}">some code</c:if>
回答1:
eq exists (as well as ne, lt, etc) so you can avoid using XML entity references (< is an XML character and would need to be escaped as <, for example), but they do the same thing.
See Comparison operators in JSP for more info.
来源：https://stackoverflow.com/questions/2087721/difference-between-eq-and-in-jsp