function returnTwo(t) {
  return ('0'+t).toString().slice(-2);
}

Vue.filter('filterTime',function (value) {
  var t = new Date(value).getTime();
  var time = new Date(t);
  var Y = time.getFullYear();
  var M = returnTwo(time.getMonth());
  var D = returnTwo(time.getDate());
  var HH = returnTwo(time.getHours());
  var MM = returnTwo(time.getMinutes());
  var SS = returnTwo(time.getSeconds());
  return `${Y}-${M}-${D} ${HH}:${MM}:${SS}`
})

定义一个全局过滤器即可使用;