//日期格式化
    formatDateTime(date) {
      var y = date.getFullYear();
      var m = date.getMonth() + 1;
      m = m < 10 ? "0" + m : m;
      var d = date.getDate();
      d = d < 10 ? "0" + d : d;
      var h = date.getHours();
      h = h < 10 ? "0" + h : h;
      var minute = date.getMinutes();
      minute = minute < 10 ? "0" + minute : minute;
      var second = date.getSeconds();
      second = second < 10 ? "0" + second : second;
      return y + "-" + m + "-" + d + " " + h + ":" + minute + ":" + second;
    }

console.log(this.formatDateTime(startTime));