Receiving ServletContext Into A Plain Java Class?

Question

I'm just starting out learning some JSP and servlets today and was wondering if it's possible to get the session's ServletContext as a variable and pass it to a plain Java class? If so, how may I do that?

My simple servlet:

public class myServlet extends HttpServlet {

    protected void doPost(HttpServletRequest request, HttpServletResponse response) {
                HttpSession session = request.getSession(true); 

                //How do I receive the servlet context below in a plain Java class?
                ServletContext sc = session.getServletContext();
                request.setAttribute("sc", sc); 
        }
}

My Java class is just a plain one:

public class myClass extends HttpServlet {

   //I want to be able to use the ServletContext as a variable that is passed from myServlet class into this one.

}

In myClass I want to be able to use it to get the real path file of a file within my project:

ServletContext sc String path = sc.getRealPath(...)

EDIT: Can I do something like this in myServlet servlet?:

String realPath = sc.getRealPath("/WEB-INF/myFile");

But then how do I pass this realPath variable into myClass so I can use it there instead of in myServlet?

Answer 1

1. create a class

   public class MyClass {....}

2. Have a variable of type ServletContext

   private ServletContext myContext;

3. Set value through Constructor or setter

   void setContext (ServletContext sc) {myContext = sc;}

4. Use it

   myContext.get....("xxx");

Edit

You can use this class from your servlet as

doPost (....) {

   ....
    ServletContext sc = session.getServletContext();
   MyClass mc = new MyClass ();
   mc.setContext (sc);

 // now the context is **in** the MyClass instance - how you use it is up to you.