我有一个用JavaScript打印当前日期和时间的脚本，但DATE总是错误的。这是代码：
var currentdate = new Date();
var datetime = "Last Sync: " + currentdate.getDay() + "/"+currentdate.getMonth()
+ "/" + currentdate.getFullYear() + " @ "
+ currentdate.getHours() + ":"
+ currentdate.getMinutes() + ":" + currentdate.getSeconds();
应打印18/04/2012 15:07:33并打印3/3/2012 15:07:33
有任何帮助吗？感谢
答案 0 :(得分：528)
致电.getMonth()时，您需要添加+1才能显示正确的月份。
Javascript的计数始终从0开始，因此调用.getMonth()可能会返回4而不是5。
因此，在您的代码中，我们可以使用currentdate.getMonth()+1输出正确的值。另外：
.getDate()返回该月的某一天＆lt; - 这是您想要的那个 .getDay()是Date对象的单独方法，它将返回表示当前星期几（0-6）0 == Sunday等的整数因此您的代码应如下所示：
var currentdate = new Date();
var datetime = "Last Sync: " + currentdate.getDate() + "/"
+ (currentdate.getMonth()+1) + "/"
+ currentdate.getFullYear() + " @ "
+ currentdate.getHours() + ":"
+ currentdate.getMinutes() + ":"
+ currentdate.getSeconds();
JavaScript Date实例继承自Date.prototype。您可以修改构造函数的原型对象，以影响JavaScript Date实例继承的属性和方法
您可以使用Date原型对象来创建一个新方法，该方法将返回今天的日期和时间。这些新方法或属性将由Date对象的所有实例继承，因此如果您需要重新使用此功能，它将特别有用。
// For todays date;
Date.prototype.today = function () {
return ((this.getDate() < 10)?"0":"") + this.getDate() +"/"+(((this.getMonth()+1) < 10)?"0":"") + (this.getMonth()+1) +"/"+ this.getFullYear();
}
// For the time now
Date.prototype.timeNow = function () {
return ((this.getHours() < 10)?"0":"") + this.getHours() +":"+ ((this.getMinutes() < 10)?"0":"") + this.getMinutes() +":"+ ((this.getSeconds() < 10)?"0":"") + this.getSeconds();
}
然后，您可以通过执行以下操作来简单地检索日期和时间：
var newDate = new Date();
var datetime = "LastSync: " + newDate.today() + " @ " + newDate.timeNow();
或者调用内联方法，这样就可以了 -
var datetime = "LastSync: " + new Date().today() + " @ " + new Date().timeNow();
答案 1 :(得分：211)
要获得时间和日期，请使用
new Date().toLocaleString();
>> "09/08/2014, 2:35:56 AM"
仅获取您应该使用的日期
new Date().toLocaleDateString();
>> "09/08/2014"
只获得你应该使用的时间
new Date().toLocaleTimeString();
>> "2:35:56 AM"
或者，如果您只想要格式为hh:mm而没有AM / PM的美国英语
new Date().toLocaleTimeString('en-US', { hour12: false,
hour: "numeric",
minute: "numeric"});
>> "02:35"
或英国英语
new Date().toLocaleTimeString('en-GB', { hour: "numeric",
minute: "numeric"});
>> "02:35"
了解更多here。
答案 2 :(得分：61)
对于这个真正的mysql样式，请使用以下函数：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 3 :(得分：27)
只需使用：
var d = new Date();
document.write(d.toLocaleString());
document.write("<br>");
答案 4 :(得分：11)
var currentdate = new Date();
var datetime = "Last Sync: " + currentdate.getDate() + "/"+(currentdate.getMonth()+1)
+ "/" + currentdate.getFullYear() + " @ "
+ currentdate.getHours() + ":"
+ currentdate.getMinutes() + ":" + currentdate.getSeconds();
将.getDay()方法更改为.GetDate()并添加一个月，因为它从0开始计算数月。
答案 5 :(得分：5)
这应该可以解决问题：
function dateToString(date) {
var month = date.getMonth() + 1;
var day = date.getDate();
var dateOfString = (("" + day).length < 2 ? "0" : "") + day + "/";
dateOfString += (("" + month).length < 2 ? "0" : "") + month + "/";
dateOfString += date.getFullYear();
return dateOfString;
}
var currentdate = new Date();
var datetime = "Last Sync: ";
datetime += dateToString(currentdate );
datetime += + currentdate.getHours() + ":"
+ currentdate.getMinutes() + ":"
+ currentdate.getSeconds();
答案 6 :(得分：4)
您需要使用getDate（）来获取日期部分。 getDay（）函数返回日期编号（Sunday = 0，Monday = 1 ...），getMonth（）返回基于0的索引，因此需要将其递增1。
var currentdate = new Date();
var datetime = "Last Sync: " + currentdate.getDate() + "/"+ (parseInt(currentdate.getMonth()) + 1)
+ "/" + currentdate.getFullYear() + " @ "
+ currentdate.getHours() + ":"
+ currentdate.getMinutes() + ":" + currentdate.getSeconds();
答案 7 :(得分：4)
getDay()获取一周中的某一天。 3是星期三。您需要getDate()，这将返回18。
同样getMonth()从0开始，您需要添加1才能获得4（4月）。
答案 8 :(得分：3)
获取当前日期和时间
var now = new Date();
var datetime = now.getFullYear()+'/'+(now.getMonth()+1)+'/'+now.getDate();
datetime += ' '+now.getHours()+':'+now.getMinutes()+':'+now.getSeconds();
答案 9 :(得分：3)
我找到了从这里获取JavaScript当前日期和时间的最简单方法 - How to get current Date and Time using JavaScript
var today = new Date();
var date = today.getFullYear()+'-'+(today.getMonth()+1)+'-'+today.getDate();
var time = today.getHours() + ":" + today.getMinutes() + ":" + today.getSeconds();
var CurrentDateTime = date+' '+time;
答案 10 :(得分：2)
.getDay返回星期几。你需要.getDate。 .getMonth返回0到11之间的值。您需要在结果中加1才能获得“人工”月份数。
答案 11 :(得分：2)
我开发Steve answer来获得OP的确切需求
new Date().toLocaleString().replace(',','')
console.log(new Date().toLocaleString().replace(',',''));
答案 12 :(得分：1)
我需要在后期效果中找到答案。以下是我从几个不同来源获取元素后得出的结果 - 格式为MM / DD / YYYY HH：MM AM / PM
D = new Date(Date(00));
M = D.getMonth()+1;
H = D.getHours();
Mi = D.getMinutes();
N = "AM"
if (H >= 12)
N = "PM"
if (H > 12)
{
H = H-12
}
amtOfZeroes = 2;
isNeg = false;
if (M < 0)
{
M = Math.abs(M);
isNeg = true;
}
Mo = Math.round(M) + "";
while(Mo.length < amtOfZeroes)
{
Mo = "0" + Mo;
}
if (isNeg)
Mo = "-" + Mo;
if (H < 0)
{
H = Math.abs(H);
isNeg = true;
}
Ho = Math.round(H) + "";
while(Ho.length < amtOfZeroes)
{
Ho = "0" + Ho;
}
if (isNeg)
Ho = "-" + Ho;
if (Mi < 0)
{
Mi = Math.abs(Mi);
isNeg = true;
}
Min = Math.round(Mi) + "";
while(Min.length < amtOfZeroes)
{
Min = "0" + Min;
}
if (isNeg)
Min = "-" + Min;
T = Ho + ":" + (Min)
Mo + "/" + D.getDate() + "/" + D.getFullYear() + " " + T + " " + N
答案 13 :(得分：1)
function UniqueDateTime(format='',language='en-US'){
//returns a meaningful unique number based on current time, and milliseconds, making it virtually unique
//e.g : 20170428-115833-547
//allows personal formatting like more usual :YYYYMMDDHHmmSS, or YYYYMMDD_HH:mm:SS
var dt = new Date();
var modele="YYYYMMDD-HHmmSS-mss";
if (format!==''){
modele=format;
}
modele=modele.replace("YYYY",dt.getFullYear());
modele=modele.replace("MM",(dt.getMonth()+1).toLocaleString(language, {minimumIntegerDigits: 2, useGrouping:false}));
modele=modele.replace("DD",dt.getDate().toLocaleString(language, {minimumIntegerDigits: 2, useGrouping:false}));
modele=modele.replace("HH",dt.getHours().toLocaleString(language, {minimumIntegerDigits: 2, useGrouping:false}));
modele=modele.replace("mm",dt.getMinutes().toLocaleString(language, {minimumIntegerDigits: 2, useGrouping:false}));
modele=modele.replace("SS",dt.getSeconds().toLocaleString(language, {minimumIntegerDigits: 2, useGrouping:false}));
modele=modele.replace("mss",dt.getMilliseconds().toLocaleString(language, {minimumIntegerDigits: 3, useGrouping:false}));
return modele;
}
答案 14 :(得分：1)
基本JS（好学）：我们使用Date（）函数，并以我们的自定义格式执行所有我们需要的日期和日期。
var myDate = new Date();
let daysList = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'];
let monthsList = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Aug', 'Oct', 'Nov', 'Dec'];
let date = myDate.getDate();
let month = monthsList[myDate.getMonth()];
let year = myDate.getFullYear();
let day = daysList[myDate.getDay()];
let today = `${date} ${month} ${year}, ${day}`;
let amOrPm;
let twelveHours = function (){
if(myDate.getHours() > 12)
{
amOrPm = 'PM';
let twentyFourHourTime = myDate.getHours();
let conversion = twentyFourHourTime - 12;
return `${conversion}`
}else {
amOrPm = 'AM';
return `${myDate.getHours()}`}
};
let hours = twelveHours();
let minutes = myDate.getMinutes();
let currentTime = `${hours}:${minutes} ${amOrPm}`;
console.log(today + ' ' + currentTime);
节点JS（快速和简单）：使用（ npm install date-and-time ）安装npm pagckage，然后运行以下内容。
let nodeDate = require('date-and-time');
let now = nodeDate.format(new Date(), 'DD-MMMM-YYYY, hh:mm:ss a');
console.log(now);
答案 15 :(得分：1)
这个问题已经很老了，答案也是如此。我们现在可以使用moment.js来获取当前日期，而不是那些可怕的函数，这实际上使它非常容易。所有必须做的就是在我们的项目中包含moment.js并获得一个格式良好的日期，例如：
moment().format("dddd, MMMM Do YYYY, h:mm:ss a");
我认为这样可以更轻松地处理javascript中的日期。
答案 16 :(得分：1)
这个小代码很简单，无处不在。
<p id="dnt"></p>
<script>
document.getElementById("dnt").innerHTML = Date();
</script>
有设计空间
答案 17 :(得分：1)
function getTimeStamp() {
var now = new Date();
return ((now.getMonth() + 1) + '/' + (now.getDate()) + '/' + now.getFullYear() + " " + now.getHours() + ':'
+ ((now.getMinutes() < 10) ? ("0" + now.getMinutes()) : (now.getMinutes())) + ':' + ((now.getSeconds() < 10) ? ("0" + now
.getSeconds()) : (now.getSeconds())));
}
答案 18 :(得分：0)
如果有人正在寻找功能
console.log(formatAMPM());
function formatAMPM() {
var date = new Date();
var hours = date.getHours();
var minutes = date.getMinutes();
var seconds = date.getSeconds();
var ampm = hours >= 12 ? 'PM' : 'AM';
hours = hours % 12;
hours = hours ? hours : 12; // the hour '0' should be '12'
minutes = minutes < 10 ? '0'+minutes : minutes;
return strTime = date.getMonth() + '/' + date.getDay()+'/'+date.getFullYear()+' '+ hours + ':' + minutes +':'+ seconds + " " +ampm;
}
答案 19 :(得分：0)
var now = new Date（）;
var days = new Array('Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday');
var months = new Array('January','February','March','April','May','June','July','August','September','October','November','December');
var date = ((now.getDate()<10) ? "0" : "")+ now.getDate();
function fourdigits(number) {
return (number < 1000) ? number + 1900 : number;
}
today = days[now.getDay()] + ", " +
months[now.getMonth()] + " " +
date + ", " +
(fourdigits(now.getYear()))+" "
+ now.getHours()+":"+now.getMinutes() + ":"
+ now.getSeconds();
推荐http://anushitech.com/how/current-date-and-time-in-javascript
答案 20 :(得分：0)
它简单而精湛
$(document).ready(function () {
var fpsOut = document.getElementById('myTime');
setInterval(function () {
var d = new Date();
fpsOut.innerHTML = d;
}, 1000);
});<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="myTime"></div>
请找到以下提琴手的例子
答案 21 :(得分：0)
function display_c(){
var refresh = 1000; // Refresh rate in milli seconds
mytime = setTimeout('display_ct()', refresh)
}
function display_ct() {
var strcount
var currentdate = new Date();
document.getElementById('ct').innerHTML = currentdate.toDateString() + " " + currentdate.getHours() + ":" + currentdate.getMinutes() + ":" + currentdate.getSeconds();
tt = display_c();
}
id = 'ct' // Replace in Your id
onload = "display_ct();" // Type inside a Body Tag
答案 22 :(得分：0)
我想我很晚才能分享我的答案，但我认为这是值得的。
function __getCurrentDateTime(format){
var dt=new Date(),x,date=[];
date['d']=dt.getDate();
date['dd']=dt.getDate()>10?dt.getDate():'0'+dt.getDate();
date['m']=dt.getMonth()+1;
date['mm']=(dt.getMonth()+1)>10?(dt.getMonth()+1):'0'+(dt.getMonth()+1);
date['yyyy']=dt.getFullYear();
date['yy']=dt.getFullYear().toString().slice(-2);
date['h']=(dt.getHours()>12?dt.getHours()-12:dt.getHours());
date['hh']=dt.getHours();
date['mi']=dt.getMinutes();
date['mimi']=dt.getMinutes()<10?('0'+dt.getMinutes()):dt.getMinutes();
date['s']=dt.getSeconds();
date['ss']=dt.getSeconds()<10?('0'+dt.getSeconds()):dt.getSeconds();
date['sss']=dt.getMilliseconds();
date['ampm']=(dt.getHours()>=12?'PM':'AM');
x=format.toLowerCase();
x=x.indexOf('dd')!=-1?x.replace(/(dd)/i,date['dd']):x.replace(/(d)/i,date['d']);
x=x.indexOf('mm')!=-1?x.replace(/(mm)/i,date['mm']):x.replace(/(m)/i,date['m']);
x=x.indexOf('yyyy')!=-1?x.replace(/(yyyy)/i,date['yyyy']):x.replace(/(yy)/i,date['yy']);
x=x.indexOf('hh')!=-1?x.replace(/(hh)/i,date['hh']):x.replace(/(h)/i,date['h']);
x=x.indexOf('mimi')!=-1?x.replace(/(mimi)/i,date['mimi']):x.replace(/(mi)/i,date['mi']);
if(x.indexOf('sss')!=-1){ x=x.replace(/(sss)/i,date['sss']); }
x=x.indexOf('ss')!=-1?x.replace(/(ss)/i,date['ss']):x.replace(/(s)/i,date['s']);
if(x.indexOf('ampm')!=-1){ x=x.replace(/(ampm)/i,date['ampm']); }
return x;
}
console.log(__getCurrentDateTime()); //returns in dd-mm-yyyy HH:MM:SS
console.log(__getCurrentDateTime('dd-mm-yyyy')); //return in 05-12-2016
console.log(__getCurrentDateTime('dd/mm*yyyy')); //return in 05/12*2016
console.log(__getCurrentDateTime('hh:mimi:ss')); //return in 13:05:30
console.log（__ getCurrentDateTime（'h：mi：ss ampm'））; //在下午1：5：30返回
答案 23 :(得分：0)
var datetime = new Date().toLocaleString().slice(0,9) +" "+new Date(new Date()).toString().split(' ')[4];
console.log(datetime);
答案 24 :(得分：0)
我很好的答案是使用这一小部分JS：https://github.com/rhroyston/clock-js
clock.now --> 1462248501241
clock.time --> 11:08 PM
clock.weekday --> monday
clock.day --> 2
clock.month --> may
clock.year --> 2016
clock.since(1462245888784) --> 44 minutes
clock.until(1462255888784) --> 2 hours
clock.what.time(1462245888784) --> 10:24 PM
clock.what.weekday(1461968554458) --> friday
clock.what.day('14622458887 84') --> 2
clock.what.month(1461968554458) --> april
clock.what.year('1461968554458') --> 2016
clock.what.time() --> 11:11 PM
clock.what.weekday('14619685abcd') --> clock.js error : expected unix timestamp as argument
clock.unit.seconds --> 1000
clock.unit.minutes --> 60000
clock.unit.hours --> 3600000
clock.unit.days --> 86400000
clock.unit.weeks --> 604800000
clock.unit.months --> 2628002880
clock.unit.years --> 31536000000
答案 25 :(得分：0)
dt= new Date();
alert(dt.toISOString().substring(8,10) + "/" +
dt.toISOString().substring(5,7)+ "/" +
dt.toISOString().substring(0,4) + " " +
dt.toTimeString().substring(0,8))
答案 26 :(得分：-1)
检查出来可能会对你有用
<script language="JavaScript">
var dayarray=new Array("Sunday","Monday",
"Tuesday","Wednesday","Thursday","Friday","Saturday")
var montharray=new Array("January","February","March",
"April","May","June","July","August","September",
"October","November","December")
function getthedate(){
var mydate=new Date()
var year=mydate.getYear()
if (year < 1000)
year+=1900
var day=mydate.getDay()
var month=mydate.getMonth()
var daym=mydate.getDate()
if (daym<10)
daym="0"+daym
var hours=mydate.getHours()
var minutes=mydate.getMinutes()
var seconds=mydate.getSeconds()
var dn="AM"
if (hours>=12)
dn="PM"
if (hours>12){
hours=hours-12
}
if (hours==0)
hours=12
if (minutes<=9)
minutes="0"+minutes
if (seconds<=9)
seconds="0"+seconds
//change font size here
var cdate="<small><font color='000000' face='Arial'><b>"+dayarray[day]+",
"+montharray[month]+" "+daym+", "+year+" "+hours+":"
+minutes+":"+seconds+" "+dn
+"</b></font></small>"
if (document.all)
document.all.clock.innerHTML=cdate
else if (document.getElementById)
document.getElementById("clock").innerHTML=cdate
else
document.write(cdate)
}
if (!document.all&&!document.getElementById)
getthedate()
function goforit(){
if (document.all||document.getElementById)
setInterval("getthedate()",1000)
}
</script>
enter code here
<span id="clock"></span>
答案 27 :(得分：-1)
这是我的全格式时钟工作，包括日期、日期、年份和时间 并确保您的 PC 的日期设置为正确的日期，如果您使用的是 PHP，请确保在 php.ini date.timezone= xx where xx 您当前的时区
void gerirFicheiros(string *equipa, int *nEquipas, membro medico[][50], int *nMedicos)
{
// variaveis
FILE *ficheiro;
int i;
// tentar abrir ficheiro (r = leitura b = binario)
ficheiro = fopen(FICHEIRO_NEQUIPAS, "rb");
// se não foi possivel abrir o ficheiro (por exemplo: por não existir), mostra erro e sai
if (ficheiro == NULL)
{
printf("!!!não foi possivel abrir o ficheiro %s!!!\n", FICHEIRO_NEQUIPAS);
return;
}
fread(nEquipas, sizeof(int), 1, ficheiro);
// fechar o ficheiro
fclose(ficheiro);
ficheiro = fopen(FICHEIRO_EQUIPAS, "rb");
// se não foi possivel abrir o ficheiro (por exemplo: por não existir), mostra erro e sai
if (ficheiro == NULL)
{
printf("!!!não foi possivel abrir o ficheiro %s!!!\n", FICHEIRO_EQUIPAS);
return;
}
// posicionar no inicio do ficheiro
rewind(ficheiro);
fread(equipa, sizeof(string), *nEquipas, ficheiro);
// fechar o ficheiro
fclose(ficheiro);
}
function startTime()
{
var today=new Date();
// 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
var suffixes = ['','st','nd','rd','th','th','th','th','th','th','th','th','th','th','th','th','th','th','th','th','th','st','nd','rd','th','th','th','th','th','th','th','st','nd','rd'];
var weekday = new Array(7);
weekday[0] = "Sunday";
weekday[1] = "Monday";
weekday[2] = "Tuesday";
weekday[3] = "Wednesday";
weekday[4] = "Thursday";
weekday[5] = "Friday";
weekday[6] = "Saturday";
var month = new Array(12);
month[0] = "January";
month[1] = "February";
month[2] = "March";
month[3] = "April";
month[4] = "May";
month[5] = "June";
month[6] = "July";
month[7] = "August";
month[8] = "September";
month[9] = "October";
month[10] = "November";
month[11] = "December";
document.getElementById('txt').innerHTML=(weekday[today.getDay()] + ',' + " " + today.getDate()+'<sup>'+suffixes[today.getDate()]+'</sup>' + ' of' + " " + month[today.getMonth()] + " " + today.getFullYear() + ' Time Now ' + today.toLocaleTimeString());
t=setTimeout(function(){startTime()},500);
}<style>
sup {
vertical-align: super;
font-size: smaller;
}
</style>答案 28 :(得分：-3)
Spliterator