JSP前台显示的问题!!!!

1.

<jsp:useBean id="bean"  scope="request"  class=" ">

与

<%Bean bean=(Bean)request.getAttribute("abc");%>

作用相同！

2.在前台设置

<input type="hidden"  name="method"  value="add">

就可在Action中区别;
Sample:

String method=request.getParameter("method");

if(method!=null&&method.equals("add")){request.setAttribute("bean",bean);mapping.findForward("a");}