单项选择题
A.invalidate()B.validate()C.stop()D.imvalidate()
A.countB.limitC.pageD.pagenumber
A.response.sendRedirect("welcome.jsp")B.response.redirect("welcome.jsp")C.request.getRequestDispatcher("welcome.jsp").forward(request,response)D.request.setRequestDispatcher("welcome.jsp").forward(request,response)
A.request.getParameter("username");B.request.getParameters("username");C.request.getParameterValue("username");D.request.getParameterValues("username");
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