如何在JavaScript中获取日期时间?
如何以JavaScript格式获取日期时间,格式为31/12/2010 03:55 AM如何在JavaScript中获取日期时间?,javascript,datetime,Javascript,Datetime,如何以JavaScript格式获取日期时间,格式为31/12/2010 03:55 AM var now = new Date(); now.format("dd/MM/yyyy hh:mm TT"); 在此处获取完整详细信息:功能板2(编号) { 返回(编号12) return hours-12;//13:00及以上时减去12小时 返程时间; } 功能上午/下午(日期) { 如果(date.getHours()==0&&date.getMinutes()==0&&date.getSecon
var now = new Date();
now.format("dd/MM/yyyy hh:mm TT");
在此处获取完整详细信息:功能板2(编号)
{
返回(编号<10?'0':'')+编号;
}
活动时间(日期)
{
var hours=date.getHours();
如果(小时数>12)
return hours-12;//13:00及以上时减去12小时
返程时间;
}
功能上午/下午(日期)
{
如果(date.getHours()==0&&date.getMinutes()==0&&date.getSeconds()==0)
返回“”;//午夜没有AM
如果(date.getHours()==12&&date.getMinutes()==0&&date.getSeconds()==0)
返回“”;//中午没有下午
if(date.getHours()如果格式是“固定”的,即不必使用其他格式,则可以使用纯JavaScript,而不是使用整个库来格式化日期:
//用“0”填充左边的给定值
函数AddZero(num){
返回(num>=0&&num<10)?“0”+num:num+”;
}
window.onload=函数(){
var now=新日期();
var strDateTime=[[AddZero(now.getDate()),
AddZero(现在是.getMonth()+1),
现在。getFullYear()]。join(“/”,
[AddZero(now.getHours()),
AddZero(now.getMinutes())].join(“:”),
now.getHours()>=12?“PM”:“AM”].join(“”);
document.getElementById(“控制台”).innerHTML=“现在:”+strDateTime;
};
从语义上讲,您可能在寻找一行程序
new Date().toLocaleString()
在用户的区域设置中设置日期的格式
如果您确实在寻找格式化日期的特定方法,我建议使用库。您可以使用我在下面添加的代码片段将日期转换为几乎任何格式
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"
片段:
将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);
};
var dateFormat=函数(){
var-token=/d{1,4}| m{1,4}| yy(?:yy)?|([HhMsTt])\1?|[LloSZ]|“[^”]*“|”[^']*”/g,
时区=/\b(?[PMCEA][SDP]T |(?:太平洋|山脉|中部|东部|大西洋)(?:标准|白天|盛行)时间|(?:GMT | UTC)(?:[-+]\d{4})\b/g,
时区CLIP=/[^-+\dA-Z]/g,
pad=功能(val,len){
val=字符串(val);
len=len | | 2;
而(val.length99?数学圆(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”:(字符串(日期).match(时区)| |[“”]).pop().replace(timezoneClip,“”),
o:(o>0?“-”:“+”)+pad(数学地板(数学abs(o)/60)*100+数学abs(o)%60,4),
S:[“th”、“st”、“nd”、“rd”][d%10>3?0:(d%100-d%10!=10)*d%10]
};
返回掩码.replace(令牌、函数($0){
返回标志中的$0?标志[$0]:$0.slice(1,$0.length-1);
});
};
}();
//一些常见的格式字符串
dateFormat.masks={
“默认值”:“ddd-mmm-dd-yyyy-HH:MM:ss”,
短日期:“年月日”,
中期日期:“年月日”,
longDate:“年月日”,
完整日期:“日、月、日、年”,
短时间:“h:MM TT”,
中期:“h:MM:ss TT”,
长时间:“h:MM:ss TT Z”,
isoDate:“yyyy-mm-dd”,
等时:“HH:MM:ss”,
isoDateTime:“yyyy-mm-dd'HH:mm:ss”,
isoUtcDateTime:“UTC:yyyy-mm-dd'T'HH:mm:ss'Z'”
};
//国际化字符串
dateFormat.i18n={
姓名:[
“星期日”、“星期一”、“星期二”、“星期三”、“星期四”、“星期五”、“星期六”,
“星期日”、“星期一”、“星期二”、“星期三”、“星期四”、“星期五”、“星期六”
],
月刊:[
“一月”、“二月”、“三月”、“四月”、“五月”、“六月”、“七月”、“八月”、“九月”、“十月”、“十一月”、“十二月”,
“一月”、“二月”、“三月”、“四月”、“五月”、“六月”、“七月”、“八月”、“九月”、“十月”、“十一月”、“十二月”
]
};
//为了方便起见。。。
Date.prototype.format=函数(掩码,u
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 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 + "";
}