vue怎么设置时间 vue获取当前日期的代码

//获取当前时间并打印
      var _this = this;
      let yy = new Date().getFullYear();
      let mm = new Date().getMonth() + 1;
      let dd = new Date().getDate();
      var str = "周";
      var week = new Date().getDay();
      switch (week) {
        case 0:
          str += "日";
          break;
        case 1:
          str += "一";
          break;
        case 2:
          str += "二";
          break;
        case 3:
          str += "三";
          break;
        case 4:
          str += "四";
          break;
        case 5:
          str += "五";
          break;
        case 6:
          str += "六";
          break;
      }
      // let hh = new Date().getHours();
      // let mf = new Date().getMinutes() < 10 ? '0' + new Date().getMinutes() : new Date().getMinutes();
      // let ss = new Date().getSeconds() < 10 ? '0' + new Date().getSeconds() : new Date().getSeconds();
      _this.gettime = yy + "年" + mm + "月" + dd + "日" + " " + str;
      console.log(this.gettime);