Scriptlet in JSP - Accessing request objects

Question

I know its best to use jstl in JSPS but I have been explicitly told to use scriptlets in this project.My question is that my servlet attached an item of Arraylist to the request object and i wanted to loop over that item using scriptlet.

Example : My servlet attaches this and forwards it to a jsp

 request.setAttribute("list", Content); where Content is Arraylist<String>

The jsp is to retrieve this object and print it on the page which i tried is:

  <%    
          ArrayList<String> cont =  (ArrayList)request.getAttribute("Content");
          for (int i=0;i<cont.size();i++)
          {
              out.println(cont.get(i));

          }
   %>

Here is the error that i get

org.apache.jasper.JasperException: An exception occurred processing JSP page /EnrolledSuccess.jsp at line 35

32:           ArrayList<String> cont =  (ArrayList)request.getAttribute("cont");
33:           for (int i=0;i<=cont.size();i++)
34:           {
35:               out.println(cont.get(i));
36:               
37:           }
38:    %>

I'd also try to not ignore exceptions, but try to read and understand them. If you can't interpret them, then you should include it in your question, not ignore it as if it's decoration. — BalusC, Jun 04 '12 at 01:44

score 6 · Accepted Answer · answered Jun 04 '12 at 02:08

Try iterating Arraylist elements with Iterator.

out.println prints to the browser and System.out.println() prints to the server console.

<%    
          ArrayList<String> cont =  (ArrayList)request.getAttribute("list");
          Iterator<String> itr = cont.iterator();
          while (itr.hasNext()) {
          String element = itr.next();
          out.println(element);
    }
   %>

score 0 · Answer 2 · answered Jun 04 '12 at 01:19

0

have you tried request.getAttribute?

answered Jun 04 '12 at 01:19

FSP

4,677
2
19
19

That works. So to print the strings in the jsp should i just use system.out.println ? – Rajeshwar Jun 04 '12 at 01:25

score 0 · Answer 3 · edited Jul 02 '12 at 07:43

0

first, you must get attribute from request.
<br/>
<%<br/>
  ArrayList<String> list = (ArrayList<String>)request.getAttribute("list");<br/>
    for(int i = 0; i < list.size(); i++){<br/>
        //you can print the value<br/>
        out.printLn(list.get(i));<br/>
    }<br/>
%><br/>

edited Jul 02 '12 at 07:43

alony

10,725
3
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answered Jun 04 '12 at 01:33

Joe

1

The problem is with out.println – Rajeshwar Jun 04 '12 at 01:52

score 0 · Answer 4 · answered Jun 04 '12 at 02:24

0

Index for ArrayList starts from "0", so in for loop the condition should be either i

answered Jun 04 '12 at 02:24

phalgun dandu

11

Scriptlet in JSP - Accessing request objects

4 Answers4