JSP-无法从其他JSP页面调用Java变量吗？

Question

I have two JSP pages. One of them is call validate.jsp and the code is as below:

 String username = request.getParameter("username");
                String password = request.getParameter("password");
                String referrerURL = request.getParameter("referrerURL");

                if(userFacade.validate(username, password) == false){
                    throw new Exception(userFacade.getMsg());
                }

                // Extract the Auser object of the user and stores it in the HttpSession object
                Auser auser = userFacade.get(username, true);
                if (auser == null) {
                    throw new Exception("Invalid user.");
                }

                String usertype = auser.getAusertype();

I have another JSP called email.jsp and I want to call the variable in validate.jsp

<%@include file = "../../../login/validate.jsp" %>

   Auser auser = userFacade.get(username, true);

My directory for include file is definitely correct but however it couldn't resolve username in this JSP.

Can anyone point out any mistake I made?

EDIT:

Found out that username is inside a try catch block and if i placed it outside, I can call the variable. Is there a way to call it inside a try catch from another jsp?

Answer 1

You mentioned that removing the try/catch block "fixed" the issue. If that is the case then just define the variable outside the block, otherwise the scope is limited to only inside the block.

String username = "";
try {
    username = request.getParameter("username");
    ...

} catch (...)

Would something like this make sense?