Question

I have a variable defined at the top of my jsp page:

<%! int count = 0; %>

I then call jquery with a buttonclick like so:

<script type="text/javascript">
$(document).ready(function() {         
    $('#somebutton').click(function() {
        var c = '<%=count%>';
        <% count += 5; %>
    });
});
</script>

The idea is that the variable count will be updated (and persist) after the function is done. However, it seems to update count locally but doesn’t persist globally. When I click the button count always gets set to 5 but never increments to 10, 15, etc. upon further button clicks.

How can I update the jsp variable from within the jquery function and have it persist?

Answer 1

You would have to do a call back to the server and store the data in a session variable (or cookie I suppose depending on the security needs).