examples/webapp/ajax/content/json-response.htm

<!--
#* Licensed to the Apache Software Foundation (ASF) under one
   or more contributor license agreements.  See the NOTICE file
   distributed with this work for additional information
   regarding copyright ownership.  The ASF licenses this file
   to you under the Apache License, Version 2.0 (the
   "License"); you may not use this file except in compliance
   with the License.  You may obtain a copy of the License at

     http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing,
   software distributed under the License is distributed on an
   "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   KIND, either express or implied.  See the License for the
   specific language governing permissions and limitations
   under the License.*#
-->

This example shows how an ActionResult can return a
<a href="http://www.json.org/" target="_blank" class="external">JSON</a> response.

<p/>

Click $link to call the server using Ajax.

<div id="result">
    <!-- Ajax response will be set here -->
</div>


<script type="text/javascript" src="$context/assets/js/jquery-1.4.2.js"></script>

<script type="text/javascript">
    // Register a function that is invoked as soon as the DOM is loaded
    jQuery(document).ready(function() {

        // Register a 'click' handler that makes an Ajax request
        jQuery("#link-id").click(function(event){
            // Make ajax request
            makeRequest();

            // Prevent the default browser behavior of navigating to the link
            return false;
        })
    });

    function makeRequest() {
        var link = jQuery('#link-id');
        var extraData = link.attr('id') + '=1';
        var url = link.attr('href');
        jQuery.get(url, extraData, function(data) {
            // 'data' is the response received from the server

            // Extract the 'msg' and 'date' values from the JSON response and output the result
            var obj = jQuery.parseJSON(data);
            jQuery("#result").html("<p class='infoMsg'>" + obj.msg + obj.date + "</p>");
        }, {dataType:'json'});
    }
</script>