如何将字符串转换为JavaScript日期对象?
var st = "date in some format"
var dt = new Date();
var dt_st = // st in Date format, same as dt.
如何将字符串转换为JavaScript日期对象?
var st = "date in some format"
var dt = new Date();
var dt_st = // st in Date format, same as dt.
当前回答
对于那些正在寻找小巧而智能的解决方案的人:
String.prototype.toDate = function(format)
{
var normalized = this.replace(/[^a-zA-Z0-9]/g, '-');
var normalizedFormat= format.toLowerCase().replace(/[^a-zA-Z0-9]/g, '-');
var formatItems = normalizedFormat.split('-');
var dateItems = normalized.split('-');
var monthIndex = formatItems.indexOf("mm");
var dayIndex = formatItems.indexOf("dd");
var yearIndex = formatItems.indexOf("yyyy");
var hourIndex = formatItems.indexOf("hh");
var minutesIndex = formatItems.indexOf("ii");
var secondsIndex = formatItems.indexOf("ss");
var today = new Date();
var year = yearIndex>-1 ? dateItems[yearIndex] : today.getFullYear();
var month = monthIndex>-1 ? dateItems[monthIndex]-1 : today.getMonth()-1;
var day = dayIndex>-1 ? dateItems[dayIndex] : today.getDate();
var hour = hourIndex>-1 ? dateItems[hourIndex] : today.getHours();
var minute = minutesIndex>-1 ? dateItems[minutesIndex] : today.getMinutes();
var second = secondsIndex>-1 ? dateItems[secondsIndex] : today.getSeconds();
return new Date(year,month,day,hour,minute,second);
};
例子:
"22/03/2016 14:03:01".toDate("dd/mm/yyyy hh:ii:ss");
"2016-03-29 18:30:00".toDate("yyyy-mm-dd hh:ii:ss");
其他回答
使用这段代码:(我的问题已经用这段代码解决了)
function dateDiff(date1, date2){
var diff = {} // Initialisation du retour
var tmp = date2 - date1;
tmp = Math.floor(tmp/1000); // Nombre de secondes entre les 2 dates
diff.sec = tmp % 60; // Extraction du nombre de secondes
tmp = Math.floor((tmp-diff.sec)/60); // Nombre de minutes (partie entière)
diff.min = tmp % 60; // Extraction du nombre de minutes
tmp = Math.floor((tmp-diff.min)/60); // Nombre d'heures (entières)
diff.hour = tmp % 24; // Extraction du nombre d'heures
tmp = Math.floor((tmp-diff.hour)/24); // Nombre de jours restants
diff.day = tmp;
return diff;
}
只是新日期(st);
假设这是正确的格式。
你可以使用regex解析字符串以详细的时间,然后创建日期或任何返回格式,如:
//example : let dateString = "2018-08-17 01:02:03.4"
function strToDate(dateString){
let reggie = /(\d{4})-(\d{2})-(\d{2}) (\d{2}):(\d{2}):(\d{2}).(\d{1})/
, [,year, month, day, hours, minutes, seconds, miliseconds] = reggie.exec(dateString)
, dateObject = new Date(year, month-1, day, hours, minutes, seconds, miliseconds);
return dateObject;
}
alert(strToDate(dateString));
如果你可以使用很棒的luxon库,你可以很容易地解析你的日期。
var luxonDate = DateTime.fromISO("2014-09-15T09:00:00");
和可以访问JS date对象通过
luxonDate().toJSDate();
旧的答案使用的是MomentJS
var momentDate = moment("2014-09-15 09:00:00");
momentDate ().toDate();
你可以试试这个:
function formatDate(userDOB) { const dob = new Date(userDOB); const monthNames = [ 'January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December' ]; const day = dob.getDate(); const monthIndex = dob.getMonth(); const year = dob.getFullYear(); // return day + ' ' + monthNames[monthIndex] + ' ' + year; return `${day} ${monthNames[monthIndex]} ${year}`; } console.log(formatDate('1982-08-10'));