>创建面向json的替代布局和视图文件
>检测传入请求是否为AJAX
>显式渲染替代json布局/视图而不是text / htML

一定要在app控制器中包含RequestHandler组件和JsHelper.

在给定的控制器中：

function test() {
    if($this->RequestHandler->isAjax()) {
        $this->set('data',$this->data);
        // ExplicIT call to render an ajax response,using a layout and view made specifically for ajax
        $this->layout = 'json';
        $this->render('ajax_test');    
    }
    // else render views/controllername/test.ctp like normal
}

你的app / views / layouts / json.ctp文件：

<?PHP
    header("Pragma: no-cache");
    header("Cache-Control: no-Store,no-cache,max-age=0,must-revalidate");
    header('Content-type: text/x-json');
    header("X-JSON: ".$content_for_layout);

    echo $content_for_layout;
?>

您的app / views / controllername / ajax_test.ctp文件应仅包含：

<?PHP echo $js->object($data); ?>

现在,在您的页面上实际上将进行ajax调用,它可能看起来像这样,使用jquery代码：

<div id='status'></div>
<?PHP echo $form->create('Test',array('id'=>'testForm')),$form->input('message'),$form->end();
?>
<script type='text/javascript'>
    $('#testForm').submit(function(event) {
    event.preventDefault(); // interrupt form submission
    $.ajax({
        type: "POST",url: "/controllername/test",data: $('#testForm').serialize(),success: function(data,textStatus,XMlHttpRequest) {               
            $("#status").html(data.Test.message);
        },error: function(jqXhr,errorThrown) {
            alert("There was a problem processing the request: " + jqXHR);
        }
    });
});
</script>