如何在JavaScript中以格式31/12/2010 03:55 AM获取日期时间?
如何在JavaScript中以格式31/12/2010 03:55 AM获取日期时间?
从语义上来看,你可能正在寻找一行代码。
new Date().toLocaleString()
该函数会按照用户所在地区的格式化方式来格式化日期。
如果你真的想要以特定的方式格式化日期,我建议使用 moment.js 库。
new Date().toLocaleString([], {month: '2-digit', year: '4-digit', hour: '2-digit', minute:'2-digit'})
- Matt如果格式是“固定的”,这意味着您不必使用其他格式,您可以使用纯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>
strDateTime
将以所需格式保存日期/时间,并且如果需要,您应该能够轻松地调整它。我使用join
只是为了好的实践,没有其他作用,它比添加字符串更好。var now = new Date();
now.format("dd/MM/yyyy hh:mm TT");
点击此处获取更多详细信息:Flagrant Badassery » JavaScript 日期格式
Date().toLocaleString()
返回如下结果:2018年7月31日 下午12:58:03
非常接近 - 只需删去逗号和秒:
new Date().toLocaleString().replace(",","").replace(/:.. /," ");
结果为:2018年7月31日 12:58 下午
我意识到这个问题几乎是十年前提出的,并且回答了好几次,但考虑到我仍然在寻找相同的答案,我发现了一些鼓舞人心的解决方案,想分享一下:
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);
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);
代码:
dateFormat(new Date(),"dd/mm/yy h:MM TT")
//"20/06/14 6:49 PM"
其他示例
// 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"
代码片段:
将来自此链接的以下代码添加到您的代码中。
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);
};
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);
}
代码已于2012年9月3日10:11进行了更正
@Shadow Wizard的代码应该返回下午02:45而不是14:45。因此,我稍微修改了他的代码:
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 + "";
}