将格林尼治时间转日期格式

            formDate(dateForm) {
                if (dateForm === "") {  //解决deteForm为空传1970-01-01 00:00:00
                    return "";
                }else{
                    var dateee = new Date(dateForm ).toJSON();
                    var date = new Date(+new Date(dateee)+ 8 * 3600 * 1000).toISOString().replace(/T/g,' ').replace(/\.[\d]{3}Z/,'');
                    return date;
                }
            },