Calling servlet from JSP [duplicate]

Answer 1

the difference between put a jsp file under WebRoot and WEB-INF is: if you put under WebRoot, user can access your jsp file using the URL on the address bar of browser; if you put under WEB-INF, user can't access the file because it is hidden from public.

The only way you can access that is through Servlet using forward or redirect.

Answer 2

Here is a diagram for web application folder structure. No need to place your JSPs under WEB-INF.

• debug or put print statememnts in your Servlet to make sure that the arraylist has elements in it.
• Right-click on your browser and view page source. Is there anything generated at all?

Answer 3

You need to open the page by requesting the servlet URL instead of the JSP URL. This will call the doGet() method.

Placing JSP in /WEB-INF effectively prevents the enduser from directly opening it without involvement of the doGet() method of the servlet. Files in /WEB-INF are namely not public accessible. So if the preprocessing of the servlet is mandatory, then you need to do so. Put the JSP in /WEB-INF folder and change the requestdispatcher to point to it.

request.getRequestDispatcher("/WEB-INF/products.jsp").forward(request, response);

But you need to change all existing links to point to the servlet URL instead of the JSP URL.

See also:

• Servlets info page