ajax异步刷新

这玩意老是会忘，记一下比较好

$.ajax({                type: "post",                url: "${ctx}/",                data: {url: url},                dataType: "json",                success: function (data, textStatus, jqXHR) {                    //成功后处理逻辑                },error: function (XMLHttpRequest, textStatus, errorThrown) {                    //失败后逻辑                }            });