<div field="InsertTime" renderer="ondayRenderer" headerAlign="center" width="40" align="center">日期</div>

 

function ondayRenderer(e) {

            if (e.value != "合计") {

                var value = new Date(e.value);

                if (value) return mini.formatDate(value, 'dd');

            }

            else {

                return e.value;

            }

        }