public class SyGoodsAllServe extends HttpServlet {

 public void doGet(HttpServletRequest request, HttpServletResponse response)    throws ServletException, IOException {    doPost(request, response);  }

 public void doPost(HttpServletRequest request, HttpServletResponse response)    throws ServletException, IOException {   request.setCharacterEncoding("utf-8");   response.setContentType("text/html;charset=utf-8");      String gdpage=request.getParameter("pageno");   int pageno=0;   try {    pageno=Integer.parseInt(gdpage);   } catch (Exception e) {    pageno=0;   }   GoodsAllDao all=new GoodsAllDao();   if(pageno<=0){    pageno=1;   }   if(pageno>all.getTotalPage("tb_GoodsInfo")){    pageno=all.getTotalPage("tb_GoodsInfo");   }   Pager pag=new Pager(all.goods(pageno),all.getTotalPage("tb_GoodsInfo"));   request.setAttribute("pager", pag);   request.getRequestDispatcher("../GoodsShowsy.jsp?pageno="+pageno).forward(request, response);  }

方法里面有个参数，但是我不能做提交来获得参数，该怎么办？