JSTL EL : Getting the type of all request attributes

Question

I want to loop thru all the request attributes and displaying their type or className. I wanna do that using jstl (no scriptlets).
In the following code, what el expression shall is use for the value attribute of the c:out tag ?
<c:forEach items="requestScope" var="currentAttribute">
<c:out value="????"/>
</c:forEach>

Answer 1

Its a bit annoying, but I am curious as to howthis
is important?not so much. i just didn't expect JSTL not to provide
any way to achieve such a simple task.Yeah, things get complex when you try to make a unified approach of accessing things (the dot operator for both accessing properties through get/set methods, and for accessing values in a collection or array...). They had to choose one of the other for default behaviour I guess...
If it really is, and you are using a JSP 2.0server,
then maybe you can write up a utility function
library that contains a Boolean instanceOf(Object
obj, Class type) method, or String
getClassName(Object) method...You mean a function like the jstl functions
(startsWith, contains...)?Yeah. They aren't too hard, especially if you have any experience with custom tags (more importantly with TLDs and how to pack custom tags...)
You just make a class with a bunch of public static methods. Then you create a TLD that defines the library name, URI, and what methods map where... You pack the class in a JAR, put the TLD in the META-INF directory and put the JAR inside your WEB-INF/lib directory. You access them just like you would the JSTL functions.