how to send ArrayList from jsp to servlet

Question

I want to send an ArrayList from jsp to Servlet and retrive that ArrayList in Servlet. I am using form action=myServlet and sending ArrayList as an hidden parameter. But it is not working.

How to send arrayList from JSP to Servlet. Is it possiple

How are you using arrayList as hidden parameter? can you show code? You need to pass a request attribute, not the parameter. Parameters can only be strings — Prasad Kharkar, Aug 01 '13 at 08:24
Thank You Prasad Kharkar. Will you please tell me how to pass request attribute from jsp to Servlet. — user2500442, Aug 01 '13 at 09:02
I need. I am showing my reports in html doc. then on that same page i am giving another button pdf. on clicking that button a servlet is called which has code to show report in pdf format. the data to display should be passed to srvlet. — user2500442, Aug 01 '13 at 09:13
If you need to send those data to servlet for PDF report, then better set that arraylist into session and use that session in that servlet.Why you are sending the data from servlet to jsp then from jsp to servlet. — JDGuide, Aug 01 '13 at 10:19

score 1 · Accepted Answer · edited Jul 27 '16 at 19:31

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How to send arrayList from JSP to Servlet. Is it possiple

Yes definitely it is possible, you need to

Populate the arrayList object in the request object.
Retrieve the list in servlet.

As you have not provided information whether you are using scriptlets or jstl, I'm assuming the scriptlets.

In your JSP,

 request.setAttribute("arrayList", yourListObject);
 RequestDispatcher rd = request.getRequestDispatcher("servletUrlPattern");
 rd.forward(request, response);

In your servlet, you can access the list using

 List yourList = (List)request.getAttribute("arrayList");

To call the servlet from your JSP file,

 <form action = "yourServletUrl" method = "POST">
    //everything in the form here.
     <input type = "submit" name = "submit">
 </form>

After pressing submit button, you will be able to get your jsp data into it.

edited Jul 27 '16 at 19:31

Gabriel Lett

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answered Aug 01 '13 at 08:22

Prasad Kharkar

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Thanks Prasad. Let me try this. – user2500442 Aug 01 '13 at 09:03
1

yeap, that should work +1 – MaVRoSCy Aug 01 '13 at 09:15
I want to do all this on a button click. – user2500442 Aug 01 '13 at 09:30
On button click, you call the servlet, – Prasad Kharkar Aug 01 '13 at 09:35
yaa. but how? I am not getting that only. – user2500442 Aug 01 '13 at 09:51
I edited the answer accordingly. – Prasad Kharkar Aug 01 '13 at 09:54
ok. I was assuming that on rd.forward() will pass the control. – user2500442 Aug 01 '13 at 10:19

how to send ArrayList from jsp to servlet

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