js时间戳转日期 在线转换

// 假设我们有一个时间戳
let timestamp = 1633072800000; // 这个时间戳代表2021-10-01 00:00:00 UTC

// 创建一个Date对象
let date = new Date(timestamp);

// 获取年、月、日等信息
let year = date.getUTCFullYear();
let month = ('0' + (date.getUTCMonth() + 1)).slice(-2); // 月份是从0开始的，所以需要+1
let day = ('0' + date.getUTCDate()).slice(-2);
let hours = ('0' + date.getUTCHours()).slice(-2);
let minutes = ('0' + date.getUTCMinutes()).slice(-2);
let seconds = ('0' + date.getUTCSeconds()).slice(-2);

// 拼接成日期字符串
let dateString = year + '-' + month + '-' + day + ' ' + hours + ':' + minutes + ':' + seconds;

console.log(dateString); // 输出 "2021-10-01 00:00:00"