我想用javascript以特定格式获取当前时间。
使用下面的功能并调用它会给我 2013年2月1日星期五13:56:40 GMT + 1300(新西兰夏令时) 但我想格式化它 周五下午2:00 2013年2月1日
var d = new Date();
var x = document.getElementById("time");
x.innerHTML = d;
当然,上面的代码没有任何格式化逻辑,但我还没有遇到任何“工作”格式化程序。
答案 0 :(得分:149)
您可能想尝试
var d = new Date();
d.toLocaleString(); // -> "2/1/2013 7:37:08 AM"
d.toLocaleDateString(); // -> "2/1/2013"
d.toLocaleTimeString(); // -> "7:38:05 AM"
答案 1 :(得分:123)
JavaScript Date有几种允许您提取其部分的方法:
getFullYear()
- 返回4位数年份
getMonth()
- 返回表示一年中月份的从零开始的整数(0-11)
getDate()
- 返回月中的某一天(1-31)
getDay()
- 返回星期几(0-6)。 0是星期日,6是星期六
getHours()
- 返回当天的小时(0-23)
getMinutes()
- 返回分钟(0-59)
getSeconds()
- 返回第二个(0-59)
getMilliseconds()
- 返回毫秒数(0-999)
getTimezoneOffset()
- 返回机器本地时间与UTC之间的分钟数。
没有内置方法可以让您获得“星期五”,“二月”或“下午”等本地化字符串。你必须自己编码。要获得所需的字符串,您至少需要存储天和月的字符串表示:
var months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"];
var days = ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"];
然后,使用上述方法将它放在一起:
var d = new Date();
var day = days[d.getDay()];
var hr = d.getHours();
var min = d.getMinutes();
if (min < 10) {
min = "0" + min;
}
var ampm = "am";
if( hr > 12 ) {
hr -= 12;
ampm = "pm";
}
var date = d.getDate();
var month = months[d.getMonth()];
var year = d.getFullYear();
var x = document.getElementById("time");
x.innerHTML = day + " " + hr + ":" + min + ampm + " " + date + " " + month + " " + year;
我有一个日期格式函数,我想在我的标准库中包含它。它采用格式字符串参数来定义所需的输出。格式字符串松散地基于.Net custom Date and Time format strings。对于您指定的格式,以下格式字符串将起作用:"dddd h:mmtt d MMM yyyy"
。
var d = new Date();
var x = document.getElementById("time");
x.innerHTML = formatDate(d, "dddd h:mmtt d MMM yyyy");
这是我的完整日期格式化功能:
function formatDate(date, format, utc) {
var MMMM = ["\x00", "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"];
var MMM = ["\x01", "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"];
var dddd = ["\x02", "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"];
var ddd = ["\x03", "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"];
function ii(i, len) {
var s = i + "";
len = len || 2;
while (s.length < len) s = "0" + s;
return s;
}
var y = utc ? date.getUTCFullYear() : date.getFullYear();
format = format.replace(/(^|[^\\])yyyy+/g, "$1" + y);
format = format.replace(/(^|[^\\])yy/g, "$1" + y.toString().substr(2, 2));
format = format.replace(/(^|[^\\])y/g, "$1" + y);
var M = (utc ? date.getUTCMonth() : date.getMonth()) + 1;
format = format.replace(/(^|[^\\])MMMM+/g, "$1" + MMMM[0]);
format = format.replace(/(^|[^\\])MMM/g, "$1" + MMM[0]);
format = format.replace(/(^|[^\\])MM/g, "$1" + ii(M));
format = format.replace(/(^|[^\\])M/g, "$1" + M);
var d = utc ? date.getUTCDate() : date.getDate();
format = format.replace(/(^|[^\\])dddd+/g, "$1" + dddd[0]);
format = format.replace(/(^|[^\\])ddd/g, "$1" + ddd[0]);
format = format.replace(/(^|[^\\])dd/g, "$1" + ii(d));
format = format.replace(/(^|[^\\])d/g, "$1" + d);
var H = utc ? date.getUTCHours() : date.getHours();
format = format.replace(/(^|[^\\])HH+/g, "$1" + ii(H));
format = format.replace(/(^|[^\\])H/g, "$1" + H);
var h = H > 12 ? H - 12 : H == 0 ? 12 : H;
format = format.replace(/(^|[^\\])hh+/g, "$1" + ii(h));
format = format.replace(/(^|[^\\])h/g, "$1" + h);
var m = utc ? date.getUTCMinutes() : date.getMinutes();
format = format.replace(/(^|[^\\])mm+/g, "$1" + ii(m));
format = format.replace(/(^|[^\\])m/g, "$1" + m);
var s = utc ? date.getUTCSeconds() : date.getSeconds();
format = format.replace(/(^|[^\\])ss+/g, "$1" + ii(s));
format = format.replace(/(^|[^\\])s/g, "$1" + s);
var f = utc ? date.getUTCMilliseconds() : date.getMilliseconds();
format = format.replace(/(^|[^\\])fff+/g, "$1" + ii(f, 3));
f = Math.round(f / 10);
format = format.replace(/(^|[^\\])ff/g, "$1" + ii(f));
f = Math.round(f / 10);
format = format.replace(/(^|[^\\])f/g, "$1" + f);
var T = H < 12 ? "AM" : "PM";
format = format.replace(/(^|[^\\])TT+/g, "$1" + T);
format = format.replace(/(^|[^\\])T/g, "$1" + T.charAt(0));
var t = T.toLowerCase();
format = format.replace(/(^|[^\\])tt+/g, "$1" + t);
format = format.replace(/(^|[^\\])t/g, "$1" + t.charAt(0));
var tz = -date.getTimezoneOffset();
var K = utc || !tz ? "Z" : tz > 0 ? "+" : "-";
if (!utc) {
tz = Math.abs(tz);
var tzHrs = Math.floor(tz / 60);
var tzMin = tz % 60;
K += ii(tzHrs) + ":" + ii(tzMin);
}
format = format.replace(/(^|[^\\])K/g, "$1" + K);
var day = (utc ? date.getUTCDay() : date.getDay()) + 1;
format = format.replace(new RegExp(dddd[0], "g"), dddd[day]);
format = format.replace(new RegExp(ddd[0], "g"), ddd[day]);
format = format.replace(new RegExp(MMMM[0], "g"), MMMM[M]);
format = format.replace(new RegExp(MMM[0], "g"), MMM[M]);
format = format.replace(/\\(.)/g, "$1");
return format;
};
答案 2 :(得分:18)
2017年更新:使用 toLocaleDateString 和 toLocaleTimeString 格式化日期和时间。传递给这些方法的第一个参数是区域设置值,例如 en-us 。第二个参数(如果存在)指定格式选项,例如工作日的长格式。
let date = new Date();
let options = {
weekday: "long", year: "numeric", month: "short",
day: "numeric", hour: "2-digit", minute: "2-digit"
};
console.log(date.toLocaleTimeString("en-us", options));
输出:2017年10月25日星期三,晚上8:19
请参阅以下链接了解更多详情。
答案 3 :(得分:12)
您可以使用我的strftime端口:
/* Port of strftime(). Compatibility notes:
*
* %c - formatted string is slightly different
* %D - not implemented (use "%m/%d/%y" or "%d/%m/%y")
* %e - space is not added
* %E - not implemented
* %h - not implemented (use "%b")
* %k - space is not added
* %n - not implemented (use "\n")
* %O - not implemented
* %r - not implemented (use "%I:%M:%S %p")
* %R - not implemented (use "%H:%M")
* %t - not implemented (use "\t")
* %T - not implemented (use "%H:%M:%S")
* %U - not implemented
* %W - not implemented
* %+ - not implemented
* %% - not implemented (use "%")
*
* strftime() reference:
* http://man7.org/linux/man-pages/man3/strftime.3.html
*
* Day of year (%j) code based on Joe Orost's answer:
* http://stackoverflow.com/questions/8619879/javascript-calculate-the-day-of-the-year-1-366
*
* Week number (%V) code based on Taco van den Broek's prototype:
* http://techblog.procurios.nl/k/news/view/33796/14863/calculate-iso-8601-week-and-year-in-javascript.html
*/
function strftime(sFormat, date) {
if (!(date instanceof Date)) date = new Date();
var nDay = date.getDay(),
nDate = date.getDate(),
nMonth = date.getMonth(),
nYear = date.getFullYear(),
nHour = date.getHours(),
aDays = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'],
aMonths = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'],
aDayCount = [0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334],
isLeapYear = function() {
if ((nYear&3)!==0) return false;
return nYear%100!==0 || nYear%400===0;
},
getThursday = function() {
var target = new Date(date);
target.setDate(nDate - ((nDay+6)%7) + 3);
return target;
},
zeroPad = function(nNum, nPad) {
return ('' + (Math.pow(10, nPad) + nNum)).slice(1);
};
return sFormat.replace(/%[a-z]/gi, function(sMatch) {
return {
'%a': aDays[nDay].slice(0,3),
'%A': aDays[nDay],
'%b': aMonths[nMonth].slice(0,3),
'%B': aMonths[nMonth],
'%c': date.toUTCString(),
'%C': Math.floor(nYear/100),
'%d': zeroPad(nDate, 2),
'%e': nDate,
'%F': date.toISOString().slice(0,10),
'%G': getThursday().getFullYear(),
'%g': ('' + getThursday().getFullYear()).slice(2),
'%H': zeroPad(nHour, 2),
'%I': zeroPad((nHour+11)%12 + 1, 2),
'%j': zeroPad(aDayCount[nMonth] + nDate + ((nMonth>1 && isLeapYear()) ? 1 : 0), 3),
'%k': '' + nHour,
'%l': (nHour+11)%12 + 1,
'%m': zeroPad(nMonth + 1, 2),
'%M': zeroPad(date.getMinutes(), 2),
'%p': (nHour<12) ? 'AM' : 'PM',
'%P': (nHour<12) ? 'am' : 'pm',
'%s': Math.round(date.getTime()/1000),
'%S': zeroPad(date.getSeconds(), 2),
'%u': nDay || 7,
'%V': (function() {
var target = getThursday(),
n1stThu = target.valueOf();
target.setMonth(0, 1);
var nJan1 = target.getDay();
if (nJan1!==4) target.setMonth(0, 1 + ((4-nJan1)+7)%7);
return zeroPad(1 + Math.ceil((n1stThu-target)/604800000), 2);
})(),
'%w': '' + nDay,
'%x': date.toLocaleDateString(),
'%X': date.toLocaleTimeString(),
'%y': ('' + nYear).slice(2),
'%Y': nYear,
'%z': date.toTimeString().replace(/.+GMT([+-]\d+).+/, '$1'),
'%Z': date.toTimeString().replace(/.+\((.+?)\)$/, '$1')
}[sMatch] || sMatch;
});
}
样本使用:
// Returns "Thursday 4:45pm 15 Sep 2016"
strftime('%A %l:%M%P %e %b %Y');
// You can optionally pass it a Date object
// Returns "Friday 2:00pm 1 Feb 2013"
strftime('%A %l:%M%P %e %b %Y', new Date('Feb 1, 2013 2:00 PM'));
最新代码可在此处找到:https://github.com/thdoan/strftime
答案 4 :(得分:4)
查看Date类的内部结构,您将看到可以提取所有位(日期,月份,年份,小时等)。
http://www.w3schools.com/jsref/jsref_obj_date.asp
对于像Fri 23:00 1 Feb 2013
这样的代码,代码如下:
date = new Date();
weekdayNames = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'];
monthNames = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"];
var dateString = weekdayNames[date.getDay()] + " "
+ date.getHours() + ":" + ("00" + date.getMinutes()).slice(-2) + " "
+ date.getDate() + " " + monthNames[date.getMonth()] + " " + date.getFullYear();
console.log(dateString);
&#13;
****修改后的2019-05-29让3名选民保持高兴
答案 5 :(得分:3)
对于那些感兴趣的人来说,有很多很棒的图书馆
现在真的不需要发明自己的格式说明符。
答案 6 :(得分:1)
答案 7 :(得分:1)
d = Date.now();
d = new Date(d);
d = (d.getMonth()+1)+'/'+d.getDate()+'/'+d.getFullYear()+' '+(d.getHours() > 12 ? d.getHours() - 12 : d.getHours())+':'+d.getMinutes()+' '+(d.getHours() >= 12 ? "PM" : "AM");
console.log(d);
答案 8 :(得分:0)
要使用基本Date类,您可以查看MDN的方法(而不是this reason所导致的W3Schools)。在那里,您可以找到有关访问每个单个日期/时间组件的每个方法的良好描述,以及与方法是否已弃用相关的信息。
否则,您可以查看Moment.js这是一个用于日期和时间处理的好库。您可以使用它来操作日期和时间(例如解析,格式化,i18n等)。
答案 9 :(得分:0)
function formatTime(date){
d = new Date(date);
var h=d.getHours(),m=d.getMinutes(),l="AM";
if(h > 12){
h = h - 12;
}
if(h < 10){
h = '0'+h;
}
if(m < 10){
m = '0'+m;
}
if(d.getHours() >= 12){
l="PM"
}else{
l="AM"
}
return h+':'+m+' '+l;
}
用法和结果:
var formattedTime=formatTime(new Date('2020 15:00'));
// Output: "03:00 PM"
答案 10 :(得分:0)
对于这种真正的mysql风格,请在下面使用此功能:2019/02/28 15:33:12
function getDateTime() {
var now = new Date();
var year = now.getFullYear();
var month = now.getMonth()+1;
var day = now.getDate();
var hour = now.getHours();
var minute = now.getMinutes();
var second = now.getSeconds();
if(month.toString().length == 1) {
month = '0'+month;
}
if(day.toString().length == 1) {
day = '0'+day;
}
if(hour.toString().length == 1) {
hour = '0'+hour;
}
if(minute.toString().length == 1) {
minute = '0'+minute;
}
if(second.toString().length == 1) {
second = '0'+second;
}
var dateTime = year+'/'+month+'/'+day+' '+hour+':'+minute+':'+second;
return dateTime;
}
// example usage: realtime clock
setInterval(function(){
currentTime = getDateTime();
document.getElementById("digital-clock").innerHTML = currentTime;
}, 1000);
<div id="digital-clock"></div>
答案 11 :(得分:0)
我不建议足够使用Moment。如果您能够使用第三方库,强烈建议您使用。除了格式化外,它还可以很好地处理时区,解析,持续时间和时间旅行,并且将在简单性和时间上带来好处(以尺寸,抽象和性能为代价)。
您想要的东西看起来像这样:
2013年2月1日星期五下午2:00
好吧,有了Moment,您所需要做的就是:
import Moment from "moment";
Moment().format( "dddd h:mma D MMM YYYY" ); //=> "Wednesday 9:20am 9 Dec 2020"
如果您想匹配确切的日期和时间,那么您要做的就是:
import Moment from "moment";
Moment( "2013-2-1 14:00:00" ).format( "dddd h:mma D MMM YYYY" ) ); //=> "Friday 2:00pm 1 Feb 2013"
here上还有许多其他格式设置选项。
转到他们的home page可以看到更详细的说明,但是,如果您使用的是npm或yarn,它就很简单:
npm install moment --save
或
yarn add moment
答案 12 :(得分:-1)
ISO8601(例如:HH:MM:SS,07:55:55或18:50:30) 在chrome上:
new Date(Date.now())。toTimeString()。substr(0,8);
在边缘:
new Date(Date.now())。toLocaleTimeString();
答案 13 :(得分:-2)
function startTime() {
var today = new Date(),
h = checkTime(((today.getHours() + 11) % 12 + 1)),
m = checkTime(today.getMinutes()),
s = checkTime(today.getSeconds());
document.getElementById('demo').innerHTML = h + ":" + m + ":" + s;
t = setTimeout(function () {
startTime()
}, 500);
}
startTime();
})();
5时十二分00秒
答案 14 :(得分:-2)
let date = new Date();
let time = date.format("hh:ss")