let nowTime = new Date();
    let time = nowTime.getFullYear();
    console.log(time)
    time += "0" + (nowTime.getMonth() + 1)
    console.log(time)
    time += "0" + (nowTime.getDate())
    console.log(time)
    time += "0" + (nowTime.getHours())
    console.log(time)
    time += "0" + (nowTime.getMinutes())
    console.log(time)
    time += "0" + (nowTime.getSeconds())
    console.log(time)

2019
201902
201902016
20190201607
20190201607053
20190201607053053