<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<%
String userName = request.getParameter("name");
if(null!=userName){
session.setAttribute("sessionUser", userName);
application.setAttribute("appUser", userName);
}
%>
User from request scope is <%=request.getParameter("name") %>
<br>
User from session scope is <%=session.getAttribute("sessionUser")%>
<br>
User from application is <%=application.getAttribute("appUser") %>
</body>
</html>
PageContext :
We can use all request, session, application scope in pagecontext.
findAttribute("someattr") : is used to find the attribute
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<%
String userName = request.getParameter("name");
if(null!=userName){
session.setAttribute("sessionUser", userName);
application.setAttribute("appUser", userName);
pageContext.setAttribute("pageContextAttr", userName, PageContext.SESSION_SCOPE);
}
%>
User from request scope is <%=request.getParameter("name") %>
<br>
User from session scope is <%=session.getAttribute("sessionUser")%>
<br>
User from application is <%=application.getAttribute("appUser") %>
<br>
User from Page Context is by specifying scope :<%=pageContext.getAttribute("pageContextAttr", PageContext.SESSION_SCOPE)%>
<br>
User from Page Context is using findAttribute irrespective of scope :<%=pageContext.findAttribute("pageContextAttr")%>
</body>
</html>
