Unix 时间戳转换器

import time
sec = int(time.time())             # 秒级 (10位)
ms = time.time_ns() // 1_000_000   # 毫秒级 (13位)

from datetime import datetime, timezone
# 转换秒级时间戳为 UTC 时间对象：
dt = datetime.fromtimestamp(timestamp, tz=timezone.utc)
print(dt.isoformat())

import "time"
sec := time.Now().Unix()      // 秒级 (int64)
ms := time.Now().UnixMilli()  // 毫秒级 (int64)

tm := time.Unix(timestamp, 0).UTC()
fmt.Println(tm.Format(time.RFC3339))

use std::time::{SystemTime, UNIX_EPOCH};
let sec = SystemTime::now().duration_since(UNIX_EPOCH).unwrap().as_secs();

use chrono::{DateTime, Utc};
let dt = DateTime::from_timestamp(timestamp, 0).unwrap();
println!("{}", dt.to_rfc3339());

long sec = System.currentTimeMillis() / 1000L; // 秒级
long ms = System.currentTimeMillis();          // 毫秒级
long epochSec = java.time.Instant.now().getEpochSecond();

Instant instant = Instant.ofEpochSecond(timestamp);
String iso = DateTimeFormatter.ISO_INSTANT.format(instant);
System.out.println(iso);

long sec = DateTimeOffset.UtcNow.ToUnixTimeSeconds();
long ms = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();

var dto = DateTimeOffset.FromUnixTimeSeconds(timestamp);
Console.WriteLine(dto.UtcDateTime.ToString("o"));

$sec = time();                          // 秒级
$ms = round(microtime(true) * 1000);   // 毫秒级

$date = new DateTime("@$timestamp", new DateTimeZone("UTC"));
echo $date->format(DateTime::ATOM);

# 获取当前时间戳：
date +%s    # 秒级 (GNU/BSD 通用)
date +%s%3N # 毫秒级 (GNU date)

# 将时间戳格式化为 UTC 字符串：
# Linux (GNU date):
date -d @1757419200 -u +"%Y-%m-%d %H:%M:%S UTC"
# macOS (BSD date):
date -r 1757419200 -u +"%Y-%m-%d %H:%M:%S UTC"

-- PostgreSQL:
SELECT EXTRACT(EPOCH FROM NOW())::BIGINT;
-- MySQL:
SELECT UNIX_TIMESTAMP();

-- PostgreSQL:
SELECT TO_TIMESTAMP(1757419200);
-- MySQL:
SELECT FROM_UNIXTIME(1757419200);