How to get multiple values using HttpSession.getAttribute(java.lang.String)

Hey Guys
I'm trying to find a way to get multiple values using the following method
HttpSession.getAttribute(java.lang.String)
Here's the scenerio. Its a already written application and now i'm trying to make some changes. earlier in the jsp page a combo box was used and value was retrieved in the servlet using the getAttribute method of Session. Now I'm using a html multiple selection list and have to retrieve all the values selected in the list in the servlet. Can anyone please suggest me how to do that. HTTPRequest class has a method getParameterValues which will let me do that but i have to do is using HTTPSession.
Thanks for your time to read this

I'm not sure what you are trying to do. You can only use session.getAttribute to retrieve something that has already been stored in the session with a previous setAttribute. If you need to store multiple values under one attribute name using setAttribute, you can store an array, or an ArrayList or whatever type of Collection you want. The request.getParameterValues method is the only way you can retrieve form parameters than can have multiple values. If the servlet hasn't already processed these parameters and put them into the session for you, you have to use request.getParameterValues.

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