Accessing scoped variables using EL

[Vinod Awar]

Hii ranchers,

Iam learning EL.iam trying my hand at some sample code.In servlet iam setting attributes in different scopes. and then in a jsp page i try to access these attributes using EL.Here is my servlet code

 
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
request.setAttribute("attribute1", "First value");
HttpSession session=request.getSession();
session.setAttribute("attribute2", "Second Value");
ServletContext application=getServletContext();
application.setAttribute("attribute3",new java.util.Date());
request.setAttribute("repeated","Request");
session.setAttribute("repeated","Session");
application.setAttribute("application", "Application");
RequestDispatcher dispatcher=request.getRequestDispatcher("/scoped-vars.jsp");
   dispatcher.forward(request, response);
   
}

and jsp page

 <ul>
   <li><b>attribute1:</b>${attribute1}
   <li><b>attribute2:</b>${attribute2}
   <li><b>attribute3:</b>${attribute3}
   <li><b>Source of attributes:</b>${repeated}
 </ul>   

now how can i access all values of the attribute repeated.


Thanks,

[Christophe Verré]

You can access the different scopes via the following implicit objects:
pageScope, requestScope, sessionScope, applicationScope.

<li><b>Source of attributes:</b>${requestScope.repeated},${sessionScope.repeated}

[Vinod Awar]

Thanks Satou kurinosuke


I tried that and it works. But does that mean web designers are supposed to know the scope of attributes they are trying to access.

[Christophe Verré]

Better say that you usually put a variable in only one scope, to avoid troubles. Putting the same variable in different scope is asking for troubles

[Vinod Awar]

Thank you