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这篇文章主要介绍了JavaScript通过Date-Mask将日期转换成字符串的方法,涉及javascript日期、数组及字符串操作的相关技巧,需要的朋友可以参考下
本文实例讲述了JavaScript通过Date-Mask将日期转换成字符串的方法。分享给大家供大家参考。具体实现方法如下：
var MonthNames = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"];
var DayNames = [ "Sunday", "Monday", "Tueday", "Wednesday", "Thursday",
"Friday", "Saturday" ];
var ShortMths = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug",
"Sep", "Oct", "Nov", "Dec"];
var ShortDays = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"];
var StringToDate = function (sDate, sFormat, cutOff) {
// Input: a date value as a string, it's format as a string e.g. 'dd-mmm-yy'
// Optional: a cutoff (integer) for 2 digit years.
// If no 'd' appears in the format string then the 1st of the month is assumed.
// If the year is 20 and the cut-off is 30 then the value will be converted
// to 2020; if the year is 40 then this will be converted to 1940.
// If no cut-off is supplied then '20' will be pre-pended to the year (YY).
// Output: a string in the format 'YYYY/MM/DD' or ''
// Will not attempt to convert certain combinations e.g. DMM, MDD, DDM, YYYYD.
var sParsed, fndSingle;
// sParsed will be constructed in the format 'YYYY/MM/DD'
sDate = sDate.toString().toUpperCase();
sFormat = sFormat.toUpperCase();
if (sFormat.search(/MMMM|MMM/) + 1) { // replace Mar/March with 03, etc.
sDate = sDate.replace(new RegExp('(' + ShortMths.join('|') + ')[A-Z]*', 'gi'),
function (m) {
var i = ShortMths.indexOf(m.charAt(0).toUpperCase() +
m.substr(1, 2).toLowerCase()) + 1;
return ((i < 10) ? "0" + i : "" + i).toString();
});
sFormat = sFormat.replace(/MMMM|MMM/g, 'MM');
}
if (sFormat.search(/DDDD|DDD/) + 1) { // replace Tue/Tuesday, etc. with ''
sDate = sDate.replace(new RegExp('(' + ShortDays.join('|') + ')[A-Z]*', 'gi'),'');
sFormat = sFormat.replace(/DDDD|DDD/g, '');
}
sDate = sDate.replace(/(^|\D)(\d)(?=\D|$)/g, function($0, $1, $2) {
// single digits 2 with 02
return $1 + '0' + $2;
});
sFormat = sFormat.replace(/(^|[^DMY])(D|M)(?=[^DMY]|$)/g, function($0, $1, $2){
return $1 + $2 + $2; // replace D or M with DD and MM
});
// are there still single Ds or Ms?
fndSingle = sFormat.search(/(^|[^D])D([^D]|$)|(^|[^M])M([^M]|$)/)+1;
// do not attempt to parse, for example, 'DMM'
if ( fndSingle ) return '';
sFormat = sFormat.replace(/(^|[^Y])(YY)(?=[^Y]|$)/g, function($0, $1, $2, index) {
var tempDate = sDate.substr(0, index + 1);
tempDate += (cutOff) ? ((parseInt(sDate.substr(index + 1, 2),10) > cutOff) ? '19' : '20') : '20';
tempDate += sDate.substr(index + 1);
sDate = tempDate;
return $1 + $2 + $2;
});
sParsed = ('YYYY/MM/DD').replace(/YYYY|MM|DD/g, function(m){
return (sFormat.indexOf(m) + 1) ?
sDate.substr(sFormat.indexOf(m), m.length) : '';
});
if (sParsed.charAt(0) == '/') {
// if no year specified, assume the current year
sParsed = (new Date().getFullYear()) + sParsed;
}
if (sParsed.charAt(sParsed.length - 1) == '/') {
// if no date, assume the 1st of the month
sParsed += '01';
}
// should end up with 10 characters..
return ( sParsed.length == 10 ) ? sParsed : '';
};
希望本文所述对大家的javascript程序设计有所帮助。 |
发表于 2015-6-4 17:08:51
