servlet中如何获取jsp中session保存的那些值

Question

session.setAttribute("cardno",request.getParameter("cardno"));
out.println("卡号是："+session.getAttribute("cardno"));

Answer 1

在Servlet 的serveic(request,response)或doGet(request,response)中String name = request.getParameter("cardno");
String password = request.getParameter("cardpwd");Session session = request.getSession();
session.setAttribute("cardno",name);PrintWriter out = response.getWriter();out.println("卡号是："+session.getAttribute("cardno"));

Answer 2

注意：
request.getAttribute("cardno"));
request.getParameter("cardno"));
之间的区别

Answer 3

kbb(漫步) ：
   那你就详细介绍一下它们的区别吧：）

Answer 4

request.getAttribute("cardno"));
request.getParameter("cardno"));
有什么区别

Answer 5

out.println("卡号是：" + (String)session.getAttribute("cardno") );