Unix 时间戳文本互转工具使用指南：秒毫秒精度时区实时转换

date -j -f "%Y-%m-%d %H:%M:%S" "2025-06-17 16:00:00" +%s  

date -d "2025-06-17 16:00:00" +%s  

date -r  "+%Y-%m-%d %H:%M:%S"  

[DateTime]::ToUniversalTime([DateTime]'2025-06-17 16:00:00').Subtract([DateTime]::new(1970, 1, 1, 0, 0, 0, [DateTimeKind]::Utc)).TotalSeconds  

$epoch = [DateTime]::new(1970, 1, 1, 0, 0, 0, [DateTimeKind]::Utc)  
$timestamp = 1750118400  
$epoch.AddSeconds($timestamp).ToString("yyyy-MM-dd HH:mm:ss")  

from datetime import datetime  

time_str = "2025-06-17 16:00:00"  
# 转成本地时区的时间戳  
local_time = datetime.strptime(time_str, "%Y-%m-%d %H:%M:%S")  
local_timestamp = int(local_time.timestamp())  
print(local_timestamp)  # 输出秒级时间戳  

# 转成 UTC 时区的时间戳  
utc_time = local_time.astimezone(datetime.timezone.utc)  
utc_timestamp = int(utc_time.timestamp())  
print(utc_timestamp)  

import time  

time_str = "2025-06-17 16:00:00"  
time_struct = time.strptime(time_str, "%Y-%m-%d %H:%M:%S")  
millisecond_timestamp = int(time.mktime(time_struct)) *   
print(millisecond_timestamp)  

from datetime import datetime  

timestamp =   
# 本地时区  
local_time = datetime.fromtimestamp(timestamp)  
print(local_time.strftime("%Y-%m-%d %H:%M:%S"))  

# UTC 时区  
utc_time = datetime.utcfromtimestamp(timestamp)  
print(utc_time.strftime("%Y-%m-%d %H:%M:%S"))  

from datetime import datetime  

millisecond_timestamp =   
# 先转成秒级  
timestamp = millisecond_timestamp //   
# 处理毫秒部分  
milliseconds = millisecond_timestamp %   
utc_time = datetime.utcfromtimestamp(timestamp)  
print(utc_time.strftime("%Y-%m-%d %H:%M:%S.%f")[:-] + f"{milliseconds:03d}")  

const timeStr = "2025-06-17T16:00:00"; // ISO 8601 格式，T 分隔日期和时间  
const date = new Date(timeStr);  
// 毫秒级时间戳，Date.now() 返回的就是当前时间的毫秒级时间戳  
const millisecondTimestamp = date.getTime();  
console.log(millisecondTimestamp);  

// 如果文本时间不是 UTC，转成 UTC 时间戳  
const utcDate = new Date(date.toISOString());  
const utcMillisecondTimestamp = utcDate.getTime();  
console.log(utcMillisecondTimestamp);  

const millisecondTimestamp = ;  
const date = new Date(millisecondTimestamp);  
// 转成本地时区的文本时间  
const localTimeStr = date.toLocaleString(); // 格式可能因浏览器而异  
// 自定义格式  
const year = date.getFullYear();  
const month = String(date.getMonth() + ).padStart(, '0');  
const day = String(date.getDate()).padStart(, '0');  
const hour = String(date.getHours()).padStart(, '0');  
const minute = String(date.getMinutes()).padStart(, '0');  
const second = String(date.getSeconds()).padStart(, '0');  
const localTime = `${year}-${month}-${day} ${hour}:${minute}:${second}`;  
console.log(localTime);  

// 转成 UTC 时间  
const utcYear = date.getUTCFullYear();  
const utcMonth = String(date.getUTCMonth() + ).padStart(, '0');  
const utcDay = String(date.getUTCDate()).padStart(, '0');  
const utcHour = String(date.getUTCHours()).padStart(, '0');  
const utcMinute = String(date.getUTCMinutes()).padStart(, '0');  
const utcSecond = String(date.getUTCSeconds()).padStart(, '0');  
const utcTime = `${utcYear}-${utcMonth}-${utcDay} ${utcHour}:${utcMinute}:${utcSecond}`;  
console.log(utcTime);  

import java.time.LocalDateTime;  
import java.time.ZoneId;  
import java.time.ZonedDateTime;  
import java.time.Instant;  

String timeStr = "2025-06-17T16:00:00";  
LocalDateTime localDateTime = LocalDateTime.parse(timeStr);  
ZonedDateTime zonedDateTime = localDateTime.atZone(ZoneId.of("Asia/Shanghai"));  
Instant instant = zonedDateTime.toInstant();  
long secondTimestamp = instant.getEpochSecond(); // 秒级时间戳  
System.out.println(secondTimestamp);  

// 转成 UTC 时间戳  
Instant utcInstant = Instant.parse(timeStr + "Z"); // Z 表示 UTC 时区  
long utcSecondTimestamp = utcInstant.getEpochSecond();  
System.out.println(utcSecondTimestamp);  

long secondTimestamp = ;  
Instant instant = Instant.ofEpochSecond(secondTimestamp);  
ZonedDateTime zonedDateTime = instant.atZone(ZoneId.of("Asia/Shanghai"));  
LocalDateTime localDateTime = zonedDateTime.toLocalDateTime();  
String localTimeStr = localDateTime.toString(); // 格式为 ISO 8601，可自定义格式  
System.out.println(localTimeStr);  

// UTC 时间  
ZonedDateTime utcZonedDateTime = instant.atZone(ZoneId.utc());  
LocalDateTime utcLocalDateTime = utcZonedDateTime.toLocalDateTime();  
String utcTimeStr = utcLocalDateTime.toString();  
System.out.println(utcTimeStr);