如何用/ Javascript获得2位数的年份?

时间:2013-06-25 20:23:33

标签: javascript date

我正在尝试找到一些以这种格式写出当前日期的JavaScript代码:mmddyy

我发现的所有内容都使用4位数年份,我需要2位数。

5 个答案:

答案 0 :(得分:98)

此问题的具体答案可在以下一行中找到:

//pull the last two digits of the year
//logs to console
//creates a new date object (has the current date and time by default)
//gets the full year from the date object (currently 2017)
//converts the variable to a string
//gets the substring backwards by 2 characters (last two characters)    
console.log(new Date().getFullYear().toString().substr(-2));

格式化完整日期时间示例(MMddyy):jsFiddle

<强> JavaScript的:

//A function for formatting a date to MMddyy
function formatDate(d)
{
    //get the month
    var month = d.getMonth();
    //get the day
    //convert day to string
    var day = d.getDate().toString();
    //get the year
    var year = d.getFullYear();
    
    //pull the last two digits of the year
    year = year.toString().substr(-2);
    
    //increment month by 1 since it is 0 indexed
    //converts month to a string
    month = (month + 1).toString();

    //if month is 1-9 pad right with a 0 for two digits
    if (month.length === 1)
    {
        month = "0" + month;
    }

    //if day is between 1-9 pad right with a 0 for two digits
    if (day.length === 1)
    {
        day = "0" + day;
    }

    //return the string "MMddyy"
    return month + day + year;
}

var d = new Date();
console.log(formatDate(d));

答案 1 :(得分:47)

给定日期对象:

date.getFullYear().toString().substr(2,2);

它将数字作为字符串返回。如果你想把它作为整数,只需将它包装在 parseInt()函数中:

var twoDigitsYear = parseInt(date.getFullYear().toString().substr(2,2), 10);

当前年份在一行中的示例:

var twoDigitsCurrentYear = parseInt(new Date().getFullYear().toString().substr(2,2));

答案 2 :(得分:12)

var d = new Date();
var n = d.getFullYear();

是的,n会给你4位数的年份,但你总是可以使用子串或类似的东西来分割年份,因此只给你两位数:

var final = n.toString().substring(2);

这将为您提供当年的最后两位数字(2013年将变为13,等等......)

如果有更好的方法,希望有人发布它!这是我能想到的唯一方法。如果有效,请告诉我们!

答案 3 :(得分:7)

var currentYear =  (new Date()).getFullYear();   
var twoLastDigits = currentYear%100;

var formatedTwoLastDigits = "";

if (twoLastDigits <10 ) {
    formatedTwoLastDigits = "0" + twoLastDigits;
} else {
    formatedTwoLastDigits = "" + twoLastDigits;
}

答案 4 :(得分:6)

另一个版本:

var yy = (new Date().getFullYear()+'').slice(-2);