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I used Beans and Session with my servlet, JSP can use same Beans and Session or not?

April 26, 2017beans JSP servlet session Used

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I used Beans and Session with my servlet, JSP can use same Beans and Session or not?

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From: Robert Hodges This can be done, but you are likely to run into problems with class loaders. For instance, we have Apache/JServ which uses the AdaptiveClassLoader along with GNU-JSP which has a different class loader. If you just casually allocate objects in a servlet and then pick them up in JSP pages, you’ll most likely get the dreaded ClassCastException, which signals the VM’s pleasure when you try to cast a class that was brought in by a different class loader. Note that there are sometimes problems even within JSP, as GNU-JSP drops the class loader every time you recompile a page, so if you allocated a class instance using one version of the page, then recompiled and tried to fish that instance back again, you would either (1) not find it or (2) get the ClassCastException (but see para #1 above).