How to access JSTL variable in Scriptlet?

You can access the JSTL variable inside the scriptlet by calling the getAttribute() method on pageContext, request, response, or session objects, depending upon which scope your JSTL variable was created. For example, if your JSTL variable is created on request scope, you can call request.getAttribute("count") to get value of a variable named count. A JSTL variable is a variable that is created using a set tag and belongs to a particular scope, by default they are created in page scope. 

One of the common mistake Java developer makes is trying ot access JSTL variable inside scriptlet using expression language. Since in scriptlet you can only use valid Java code and expression language ${} is not valid Java code, you get errors while accessing JSTL variables in the scriptlet. 

let's see some examples of accessing JSTL variable in different scope

How to access JSTL variable from page scope

How to access JSTL variable from request scope

How to access JSTL variable from session scope

How to access the JSTL variable from the application scope

That's all about how to access the JSTL variable inside the scriptlet in JSP. BTW, it's better to use expression language inside JSP for accessing the JSTL variable, you should try to minimize the use of scriptlet and Java code inside your JSP page to keep it clutter-free and maintainable. In fact, JSTL tags, expression language, and JSP actions are there for that purpose only.