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request attribute set in the jsp cannot be retrieved in the servlet
Joined: May 25, 2010
May 25, 2010 07:42:24
For a POC purpose i was trying to set an attribute in the request and application scope in a
page. The JSP code is:-
<% ArrayList al = new ArrayList(); al.add("1"); al.add("2"); request.setAttribute("List", al); application.setAttribute("List", al); %>
When i submit the JSP in the respective
i get the request attribute as null but the context attribute is retrieved properly.
The servlet code is :-
ArrayList al1 = (ArrayList) request.getAttribute("List"); System.out.println(al1); // prints null ArrayList al2 =(ArrayList)getServletContext().getAttribute("List"); System.out.println(al2); // prints [1, 2]
Please let me know why the request attribute is coming as null in the servlet while the context attribute is coming properly.
Thanks in advance.
Author and ninkuma
Joined: Jan 10, 2002
May 25, 2010 09:55:26
Welcome to the ranch.
Please edit your post to remove the unreadable blue code and replace it to
. If people cannot read your code, how can they help you?
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Author and all-around good cowpoke
Joined: Mar 22, 2000
May 25, 2010 12:19:51
When i submit the JSP in the respective Servlet
What does that mean exactly?
You do realize that a request object only has the lifetime of a single request, right?
It is sorta covered in the
JavaRanch Style Guide
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