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Q.How does a servlet communicate with a JSP page?

In the service method
protected void service(HttpServletRequest request,HttpServletResponse response)
        throws ServletException, java.io.IOException {

User user = (User)request.getSession().getAttribute("user");
                
        String imgId = (String)request.getParameter("imgId");
        String path = request.getContextPath()+"/jsp/addnetwork.jsp";
        
        //do some thing
User user = DAO.getUser(imgId);
request.getSession().setAttribute("user",user);    
         response.sendRedirect(path);


}

In the addnetwork.jsp

User user = getAttribute("user);

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