jsp - How to get the selected value of select option using java code -

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i'm studying java web. , now, have question that. code in jsp file: 

<select id="ddlfruits" name="ddlfruits" onchange="getselectedtextvalue()">    <option value="0">banana</option>    <option value="1">apple</option>    <option value="2">mango</option>    <option value="3">orange</option> </select>  <script type="text/javascript">     function getselectedtextvalue() {         var t = document.getelementbyid("ddlfruits");                 var fruitsid = t.options[t.selectedindex].value;         <%              // how value of fruitsid in here???               // fruitsid.          %> } </script>

how selected value of select option (variable : fruitsid ) in <% // java code %>. used code: request.getparameter("fruitsid "). returned null. advance!


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