page session request application 四者的区别是什么啊?尤其是session request

page session request application 四者的区别是什么啊?尤其是session request 请区别下列变量的作用于cookie,page,request,session,application什么怎么答,不大懂, page,session,application的区别? 404 Request Page Not Found! request.getsession().setAttribute()和session.setAttribute()有什么区别? If Trim(Request.Form(yzm))=Empty Or Trim(Session(cnbruce.com_ValidateCode))Trim(Request.Form( session filter过滤器如何获得值loginservlet中 HttpSession session = request.getSession(); userRight=true; session.setAttribute(checkRight,userRight); filter中 HttpSession session = request.getSession(); String str=(String)session.getAttribute(c session.getAttribute(request.getParameter解释一下JSP里面这个啥意思?Student stu = new Student();String id=request.getParameter(id);stu = (Student) session.getAttribute(request.getParameter(id));request.getParameter(id);返回个什么 attribute和parameter的区别在网页设计中request.getParameter(),session.setAttribute(),session.getParameter().Parameter和attribute是如何区别的？ java中的pageContext request session application 这四个域的区别 作用哈哈 如果您能举例说明就更好了 page page. 跪求一段英文翻译For example, a browser will send a request for an HTML page followed by multiple requests for each image on that page request.getAttribute（） session.getAttribute() application.getAttribute() 的getAttribute方法有区别这几个对象的getAttribute()方法有没有区别呢?作用域有什么区别 用虚拟语气改写句子I request to hold another session to discuss the problem.并告之改写的理由, NO SESSION Session是什么意思?