请教一下关于request.setAttribute()的用法,谢谢.

Question

我在myServlet.java的doGet()中写道:
request.setAttribute("a","111");
response.sendRedirect("a.jsp");我在a.jsp中写道:
String aValue="";
if(request.getAttribute("a")!=null){
  aValue= String.valueOf(request.getAttribute("a"));
  }
out.println(aValue);可request.getAttribute("a")总是取不到值, 是我错误地使用了request.setAttribute()方法吗? 如果想让servlet给jsp页面传一些值应该通过什么方法呢? 谢谢~

Answer 1

我的doPost()方法是这样写的.......public void doPost(HttpServletRequest request, HttpServletResponse response) throws
            ServletException, IOException {
        doGet(request, response);
    }

Answer 2

用<jsp:forward page="/a.jsp" />

Answer 3

用
RequestDispatcher dispatcher=request.getRequestDispatcher("a.jsp");
dispatcher.forward(request,response);