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up vote 0 down vote favorite

My jsp code is

 <% List selected = (List) session.getAttribute("clist");

   JSONArray arr = new JSONArray();
    JSONObject tmp;

    for (int i = 0; i < selected.size(); i++) {
        tmp = new JSONObject();
        tmp.put("Id", selected.get(i));

        arr.put(tmp);
    }%>

and i am using hidden field to pass this array to javascript 

  <input type='hidden' id="agencycontactid" name="agencycontactid" value="<%=(null != arr) ? arr : ""%>" />

here arr gives value arr=[{"Id":"9"},{"Id":"11"}]

My javascript code is

  var s=$('#agencycontactid').val(); alert(s);

But alert gives only [{

Please help me

Thanks

share|improve this question
    
Change type hidden to text to see if it shows correct json value. I am sure the issue is there. – gaurav Nov 7 '14 at 9:11
    
@gaurav You are absolutely right.Please tell me how to set that arr value to hidden field – user100 Nov 7 '14 at 9:15
    
Your input tag looks like this: <input ... value="[{"Id":...> so the value attribute is only [{ due to the " in the string you're trying to pass – icke Nov 7 '14 at 9:15
    
@icke how to overcome this problem – user100 Nov 7 '14 at 9:25
    
See my answer below, I hope it helps. – icke Nov 7 '14 at 9:28
up vote 0 down vote accepted

change value attr from 

value="<%=(null != arr) ? arr : ""%>"

to 

value='<%=(null != arr) ? arr : ""%>'
share|improve this answer
    
it not working it gives error Uncaught SyntaxError: Unexpected end of input – user100 Nov 7 '14 at 9:25
up vote 0 down vote

The variable arr from your scriptlet is passed to the HTML as a string with the content [{"Id":"9"},{"Id":"11"}], so your input tag will look like this: <input type='hidden' id="agencycontactid" name="agencycontactid" value="[{"Id":"9"},{"Id":"11"}]" />. So the value attribute will only contain the part of the string up to the first ", i.e. [{.

You could try to put the json data in a place where " doesn't interfere with the HTML, like inside a hidden tag like so

<div id="jsondata">
    <%=arr%>
</div>

or put the scriptlet inside a <script> tag:

<script type="text/javascript">
    var s = <%=arr%>;
</script>

Changing the delimiters of the value attribute to ' instead of " would also work but would break as soon as your json data contains strings with ' in them. However if you are sure that will never be the case, that is by far the easiest fix.

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