不考虑时区的时间戳到日期的转换

// 假设时间戳为1629878400
const timestamp = 1629878400;
const date = new Date(timestamp * 1000); // 注意要将时间戳转换为毫秒

const year = date.getFullYear();
const month = date.getMonth() + 1; // 月份从0开始，需要加1
const day = date.getDate();
const hours = date.getHours();
const minutes = date.getMinutes();
const seconds = date.getSeconds();

console.log(`${year}-${month}-${day} ${hours}:${minutes}:${seconds}`);

import datetime

timestamp = 1629878400
date = datetime.datetime.fromtimestamp(timestamp)

print(date.strftime('%Y-%m-%d %H:%M:%S'))

import java.util.Date;

long timestamp = 1629878400;
Date date = new Date(timestamp * 1000);

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String formattedDate = sdf.format(date);

System.out.println(formattedDate);