后端返回的数据如：2022-09-28T19:30:05.68+08:00
月、日、分、秒一位时要在前面加"0"
解析如下：
let time = new Date(element.created_at)
var y = time.getFullYear()
var m = time.getMonth()
var d = time.getDate()
var h = time.getHours()
var mm = time.getMinutes()
if (m >= 1 && m <= 9) {
m = "0" + m;
}
if (d >= 0 && d <= 9) {
d = "0" + d;
}
if (h >= 0 && h <= 9) {
h = "0" + h;
}
if (mm >= 0 && mm <= 9) {
mm = "0" + mm;
}
element.created_at = y + '-' + m + '-'+ d +' '+ h +':' + mm
