问如何在Symfony中自我提交表格？

EN

<form class="well" action="<?php echo url_for("@submitParam?param=".$con) ?>" method="post">
  <input type="text" name="param">
  <button type="submit" class="thisBtn">Button</button>
</form>

$(".btn").live('click', function(){
        $.post("<?php echo url_for('@submitParam'); ?>", $('.box').serialize(), function(response) {
            switch(response.status) {
                case 'success':
                    console.log("Success");
                    break;
                case 'failure':
                    console.log("Failure");
                    break;
            }
        }, 'json');
        return false;
    });

$request->getParameter('param');