js-時間的各個用法及轉換

環境

3.7.5

當前時間

Date

new Date()

long

new Date().getTime();

當天0點時間

new Date(new Date().toLocaleDateString()).getTime()

昨天

          endTime = new Date(new Date().toLocaleDateString()).getTime()-1
          //0點時間
          startTime = new Date(new Date().toLocaleDateString()).getTime()-24*60*60*1000

7天內時間

startTime = new Date(new Date().toLocaleDateString()).getTime()-7*24*60*60*1000

30天內時間

startTime = new Date(new Date().toLocaleDateString()).getTime()-30*24*60*60*1000

long 轉yyyy-MM-dd hh:mm:ss

  dateFormat(date: Date, sFormat: String = 'yyyy-MM-dd hh:mm:ss', timetype = "24-hour"): string {
    let time = {
      Year: 0,
      TYear: '0',
      Month: 0,
      TMonth: '0',
      Day: 0,
      TDay: '0',
      Hour: 0,
      THour: '0',
      hour: 0,
      Thour: '0',
      Minute: 0,
      TMinute: '0',
      Second: 0,
      TSecond: '0',
      Millisecond: 0
    };
    time.Year = date.getFullYear();
    time.TYear = String(time.Year).substr(2);
    time.Month = date.getMonth() + 1;
    time.TMonth = time.Month < 10 ? "0" + time.Month : String(time.Month);
    time.Day = date.getDate();
    time.TDay = time.Day < 10 ? "0" + time.Day : String(time.Day);
    time.Hour = date.getHours();
    time.THour = time.Hour < 10 ? "0" + time.Hour : String(time.Hour);
    if (timetype == '24-hour') {
      time.hour = time.Hour
    } else {
      time.hour = time.Hour < 13 ? time.Hour : time.Hour - 12;
    }
    time.Thour = time.hour < 10 ? "0" + time.hour : String(time.hour);
    time.Minute = date.getMinutes();
    time.TMinute = time.Minute < 10 ? "0" + time.Minute : String(time.Minute);
    time.Second = date.getSeconds();
    time.TSecond = time.Second < 10 ? "0" + time.Second : String(time.Second);
    time.Millisecond = date.getMilliseconds();

    return sFormat.replace(/yyyy/ig, String(time.Year))
      .replace(/yyy/ig, String(time.Year))
      .replace(/yy/ig, time.TYear)
      .replace(/y/ig, time.TYear)
      .replace(/MM/g, time.TMonth)
      .replace(/M/g, String(time.Month))
      .replace(/dd/ig, time.TDay)
      .replace(/d/ig, String(time.Day))
      .replace(/HH/g, time.THour)
      .replace(/H/g, String(time.Hour))
      .replace(/hh/g, time.Thour)
      .replace(/h/g, String(time.hour))
      .replace(/mm/g, time.TMinute)
      .replace(/m/g, String(time.Minute))
      .replace(/ss/ig, time.TSecond)
      .replace(/s/ig, String(time.Second))
      .replace(/fff/ig, String(time.Millisecond))
  }

yyyy-MM-dd hh:mm:ss轉long

new Date("2020-05-19 00:00:00").getTime()