toTime(timestamp) {
//时间戳为10位需*1000,时间戳为13位的话不需乘1000
var date = new Date(timestamp);
var Y = (date.getFullYear() + '').padStart(2, 0) + '-';
var M = Number((date.getMonth() + '').padStart(2, 0)) + 1 + '-';
var D = (date.getDate() + '').padStart(2, 0) + ' ';
var h = (date.getHours() + '').padStart(2, 0) + ':';
var m = (date.getMinutes() + '').padStart(2, 0) + ':';
var s = (date.getSeconds() + '').padStart(2, 0);
return Y + M + D + h + m + s;
},