Js时间转换的几种情况

JS时间转换的几种情况 

Case1: year+ month+date+hour+minut+second

        var datetime = new Date(time);
        //datetime.setTime(time);
        var year = datetime.getFullYear();
        var month = datetime.getMonth() + 1 < 10 ? "0" + (datetime.getMonth() + 1) : datetime.getMonth() + 1;
        var date = datetime.getDate() < 10 ? "0" + datetime.getDate() : datetime.getDate();
        var hour = datetime.getHours() < 10 ? "0" + datetime.getHours() : datetime.getHours();
        var minute = datetime.getMinutes() < 10 ? "0" + datetime.getMinutes() : datetime.getMinutes();
        var second = datetime.getSeconds() < 10 ? "0" + datetime.getSeconds() : datetime.getSeconds();
        return year + "-" + month + "-" + date + " " + hour + ":" + minute + ":" + second;

Case2: /Date(1589699516247)/

function formater(val):{        
      if (val != null) {
            var date = new Date(parseInt(val.replace("/Date(", "").replace(")/", ""), 10));
            //月份为0-11，所以+1，月份小于10时补个0
            var month = date.getMonth() + 1 < 10 ? "0" + (date.getMonth() + 1) : date.getMonth() + 1;
            var currentDate = date.getDate() < 10 ? "0" + date.getDate() : date.getDate();
            return date.getFullYear() + "-" + month + "-" + currentDate;
        }
        return "";
}