获取当前时间：格式如’2017-09-08 8:30:00’

原文来自：http://www.cnblogs.com/hanwenhua/articles/3853352.html

getNowFormatDate() {

   var date = new Date();
   var seperator1 = "-";
   var seperator2 = ":";
   var month = date.getMonth() + 1;
   var strDate = date.getDate();
   if (month >= 1 && month <= 9) {
       month = "0" + month;
   }
   if (strDate >= 0 && strDate <= 9) {
       strDate = "0" + strDate;
   }
   var currentdate = date.getFullYear() + seperator1 + month + seperator1 + strDate
           + " " + date.getHours() + seperator2 + date.getMinutes()+ seperator2 + date.getSeconds();
   return new Date(currentdate).getTime();
}