String movieName="movie";
try {
    movieName = putMovieInSession(request);
} catch (Exception e) {
    throw new ServletException(e);
}
RequestDispatcher dispatcher = getServletContext().getRequestDispatcher("/"+movieName);

dispatcher.forward(request, response);



<servlet>
        <servlet-name>movie</servlet-name>
        <servlet-class>package.MovietServlet</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>movie</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>