public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html :charset=UTF-8");
PrinterWriter out = response.getWriter();
try{
if(request.getSession(false) == null){
out.println("Jestes na stronie po raz pierwszy.");
request.getSession();
}else
out.println("Witaj po raz kolejny.");
}finally{
out.close();
}
}