Getting ArrayList object from servlet and storing it as javascript array variable using AJAX

I have some arrayList objects as my servlet request attribute. I want to get it into my javascript variable which is in a JSP page. I tried like this.

abc.jsp

<script&g开发者_如何学Got;
var myList=<% (ArrayList)request.getParameter("list_name") %>;

//do use of myList.....

</script>

But this is not working. I am not getting the data.

Then tried with

var myList=<% =(ArrayList)request.getParameter("list_name") %>;

Didnt work!!

Thanks in advance..

Since the toString() method of ArrayList would accidentally give the desired result, then you can simply use var myList = ${list_name};. But the result of your 2nd snippet should also be working, so I would assume that you don't have the list set as a request attribute.

Make sure you've:

• called request.setAttribute("list_name", yourlist); in the servlet
• used forward, rather than redirect to the jsp.

You can also try [${fn:join(list_name, ',')}]

or

var myList = new Array();
<c:forEach items="${list_name}" var="item" varStatus="loop">
   myList[${loop.index}] = "${item}";
</c:forEach>