//千分位处理
toFormatData(num) {
  if (num == '' || num == undefined) {
    return '';
  }
  var data = parseFloat(num.toString().replace(/\,/g, ""));
  if (!isNaN(data)) {
    var temp = data.toFixed(2).toString().split(".");
    temp[0] = temp[0].replace(new RegExp('(\\d)(?=(\\d{3})+$)', 'ig'), "$1,");
    return temp.join(".");
  } else {
    return '';
  }
}