时间戳格式转化

1.格式化成 YY-MM-DD  HH:MM:SS

        formDate:function(time){
            var newDate = "";
            if(time !==""){
                var d = new Date(time*1000),
                    y = d.getFullYear(),
                    m = d.getMonth() + 1,
                    dd = d.getDate(),
                    h = d.getHours(),
                    min = d.getMinutes(),
                    s = d.getSeconds();
                newDate = y+"-"+m+"-"+dd+"  "+h+":"+min+":"+s;
            }
            return newDate;
        }

formDate(1504662989) // "2017-9-6  9:56:29"