如何在 JavaScript 中获取日期时间？

如何获得日期时间在 JavaScript 格式31/12/201003:55 AM？

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var now = new Date();


now.format("dd/MM/yyyy hh:mm TT");

详情请点击这里: Flagrant Badassery”JavaScript 日期格式

小开 
function pad_2(number)
{
return (number < 10 ? '0' : '') + number;
}


function hours(date)
{
var hours = date.getHours();
if(hours > 12)
return hours - 12; // Substract 12 hours when 13:00 and more
return hours;
}


function am_pm(date)
{
if(date.getHours()==0 && date.getMinutes()==0 && date.getSeconds()==0)
return ''; // No AM for MidNight
if(date.getHours()==12 && date.getMinutes()==0 && date.getSeconds()==0)
return ''; // No PM for Noon
if(date.getHours()<12)
return ' AM';
return ' PM';
}


function date_format(date)
{
return pad_2(date.getDate()) + '/' +
pad_2(date.getMonth()+1) + '/' +
(date.getFullYear() + ' ').substring(2) +
pad_2(hours(date)) + ':' +
pad_2(date.getMinutes()) +
am_pm(date);
}

代码在9月3日12点11分更正

小开

如果格式是“固定的”意味着你不必使用其他格式，你可以使用纯 JavaScript 而不是使用整个库来格式化日期:

//Pad given value to the left with "0"
function AddZero(num) {
return (num >= 0 && num < 10) ? "0" + num : num + "";
}


window.onload = function() {
var now = new Date();
var strDateTime = [[AddZero(now.getDate()),
AddZero(now.getMonth() + 1),
now.getFullYear()].join("/"),
[AddZero(now.getHours()),
AddZero(now.getMinutes())].join(":"),
now.getHours() >= 12 ? "PM" : "AM"].join(" ");
document.getElementById("Console").innerHTML = "Now: " + strDateTime;
};
<div id="Console"></div>

The variable strDateTime will hold the date/time in the format you desire and you should be able to tweak it pretty easily if you need.

I'm using join as good practice, nothing more, it's better than adding strings together.

小开

从语义上讲，你可能是在找笑话

new Date().toLocaleString()

它在用户的区域设置中格式化日期。

如果您正在寻找格式化日期的特定方法，我推荐使用 翻译: 奇芳翻译: 奇芳翻译: 奇芳翻译: 奇芳翻译: 奇芳翻译: 奇芳翻译: 奇芳翻译: 奇芳库。

小开

您可以使用我在下面添加的 片段将 Date 转换为几乎任何格式。

密码:

dateFormat(new Date(),"dd/mm/yy h:MM TT")
//"20/06/14 6:49 PM"

其他例子

// Can also be used as a standalone function
dateFormat(new Date(), "dddd, mmmm dS, yyyy, h:MM:ss TT");
// Saturday, June 9th, 2007, 5:46:21 PM


dateFormat(new Date(),"dddd d mmmm yyyy")
//Monday 2 June 2014"

片段 :

将从此 链接获取的以下代码添加到代码中。

var dateFormat = function () {
var token = /d{1,4}|m{1,4}|yy(?:yy)?|([HhMsTt])\1?|[LloSZ]|"[^"]*"|'[^']*'/g,
timezone = /\b(?:[PMCEA][SDP]T|(?:Pacific|Mountain|Central|Eastern|Atlantic) (?:Standard|Daylight|Prevailing) Time|(?:GMT|UTC)(?:[-+]\d{4})?)\b/g,
timezoneClip = /[^-+\dA-Z]/g,
pad = function (val, len) {
val = String(val);
len = len || 2;
while (val.length < len) val = "0" + val;
return val;
};


// Regexes and supporting functions are cached through closure
return function (date, mask, utc) {
var dF = dateFormat;


// You can't provide utc if you skip other args (use the "UTC:" mask prefix)
if (arguments.length == 1 && Object.prototype.toString.call(date) == "[object String]" && !/\d/.test(date)) {
mask = date;
date = undefined;
}


// Passing date through Date applies Date.parse, if necessary
date = date ? new Date(date) : new Date;
if (isNaN(date)) throw SyntaxError("invalid date");


mask = String(dF.masks[mask] || mask || dF.masks["default"]);


// Allow setting the utc argument via the mask
if (mask.slice(0, 4) == "UTC:") {
mask = mask.slice(4);
utc = true;
}


var _ = utc ? "getUTC" : "get",
d = date[_ + "Date"](),
D = date[_ + "Day"](),
m = date[_ + "Month"](),
y = date[_ + "FullYear"](),
H = date[_ + "Hours"](),
M = date[_ + "Minutes"](),
s = date[_ + "Seconds"](),
L = date[_ + "Milliseconds"](),
o = utc ? 0 : date.getTimezoneOffset(),
flags = {
d:    d,
dd:   pad(d),
ddd:  dF.i18n.dayNames[D],
dddd: dF.i18n.dayNames[D + 7],
m:    m + 1,
mm:   pad(m + 1),
mmm:  dF.i18n.monthNames[m],
mmmm: dF.i18n.monthNames[m + 12],
yy:   String(y).slice(2),
yyyy: y,
h:    H % 12 || 12,
hh:   pad(H % 12 || 12),
H:    H,
HH:   pad(H),
M:    M,
MM:   pad(M),
s:    s,
ss:   pad(s),
l:    pad(L, 3),
L:    pad(L > 99 ? Math.round(L / 10) : L),
t:    H < 12 ? "a"  : "p",
tt:   H < 12 ? "am" : "pm",
T:    H < 12 ? "A"  : "P",
TT:   H < 12 ? "AM" : "PM",
Z:    utc ? "UTC" : (String(date).match(timezone) || [""]).pop().replace(timezoneClip, ""),
o:    (o > 0 ? "-" : "+") + pad(Math.floor(Math.abs(o) / 60) * 100 + Math.abs(o) % 60, 4),
S:    ["th", "st", "nd", "rd"][d % 10 > 3 ? 0 : (d % 100 - d % 10 != 10) * d % 10]
};


return mask.replace(token, function ($0) {
return $0 in flags ? flags[$0] : $0.slice(1, $0.length - 1);
});
};
}();


// Some common format strings
dateFormat.masks = {
"default":      "ddd mmm dd yyyy HH:MM:ss",
shortDate:      "m/d/yy",
mediumDate:     "mmm d, yyyy",
longDate:       "mmmm d, yyyy",
fullDate:       "dddd, mmmm d, yyyy",
shortTime:      "h:MM TT",
mediumTime:     "h:MM:ss TT",
longTime:       "h:MM:ss TT Z",
isoDate:        "yyyy-mm-dd",
isoTime:        "HH:MM:ss",
isoDateTime:    "yyyy-mm-dd'T'HH:MM:ss",
isoUtcDateTime: "UTC:yyyy-mm-dd'T'HH:MM:ss'Z'"
};


// Internationalization strings
dateFormat.i18n = {
dayNames: [
"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat",
"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"
],
monthNames: [
"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"
]
};


// For convenience...
Date.prototype.format = function (mask, utc) {
return dateFormat(this, mask, utc);
};
小开

@ Shadow Wizard 的代码应该在下午2:45返回，而不是14:45。所以我稍微修改了一下他的代码:

function getNowDateTimeStr(){
var now = new Date();
var hour = now.getHours() - (now.getHours() >= 12 ? 12 : 0);
return [[AddZero(now.getDate()), AddZero(now.getMonth() + 1), now.getFullYear()].join("/"), [AddZero(hour), AddZero(now.getMinutes())].join(":"), now.getHours() >= 12 ? "PM" : "AM"].join(" ");
}


//Pad given value to the left with "0"
function AddZero(num) {
return (num >= 0 && num < 10) ? "0" + num : num + "";
}
小开

Date().toLocaleString()返回: 7/31/2018, 12:58:03 PM

非常接近——只要删除逗号和秒数:

new Date().toLocaleString().replace(",","").replace(/:.. /," ");

结果: 7/31/2018 12:58 PM

小开

试试这个:

var today = new Date();
var date = today.getFullYear()+'-'+(today.getMonth()+1)+'-'+today.getDate();
var time = today.getHours()+':'+today.getMinutes()+':'+today.getSeconds();
console.log(date + ' '+ time);

小开

我意识到这个问题在大约十年前就已经被问过了，而且回答了好几次，但是考虑到我仍然被同样的问题绊倒在这里，我发现了一些鼓舞人心的解决方案，我想我可以分享一下:

var jsonDate       = (new Date()).toJSON(); // "2021-08-16T16:31:53.596Z"
var localeDateTime = (new Date()).toLocaleString(); // "8/16/2021, 11:40:57 AM"
var localeDate     = (new Date()).toLocaleDateString(); // "8/16/2021"
var localeTime     = (new Date()).toLocaleTimeString(); // "11:37:13 AM"


console.log(jsonDate);
console.log(localeDateTime);
console.log(localeDate);
console.log(localeTime);

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