Servlet to Javascript

Question

In my servlet.java,

request.setAttribute("f4stat", "Somedata");
RequestDispatcher rd = request.getRequestDispatcher("my.jsp");
rd.forward(request, response);

Now, in my.jsp, in a javascript function I would like to access this f4stat data.

How to do it in Javascript?

I've tried,

var x = '<%= request.getAttribute("f4stat")%>'
if (x.length == 0)
    {
        document.getElementById("display").innerHTML = "<b> data </b>";
    }

But this is not working as in my <div id="display"> no content is being displayed even when f4stat has no value.

u may update this line in jsp: var x = '<%= request.getAttribute("f4stat")%>' to this one: var x = '${requestScope.f4stat}'; — user2575725
– user2575725, Commented Apr 14, 2014 at 9:48

Tuhin · Accepted Answer · 2014-04-25 07:11:53Z

1

You can not access HttpRequest ,HttpResponse objects of servlet in JavaScript. But This is possible by trick.

You Can Have Some Hidden Fields in my.jsp and assign value.

<script>
    function getF4(){
          document.getElementById("display").innerHTML=document.getElementById("f4").value;
    }

</script>

     <input type="hidden" id="f4" value=<%= request.getAttribute("f4stat") %>  />
     <input type="button" value="click" onclick="getF4()" />
     <div id="display"></div>

edited Apr 25, 2014 at 7:11

answered Apr 14, 2014 at 9:27

Tuhin

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