如何在javascript中格式化日期

Question

我从文本框中选择此日期，并将其格式设置为以下格式: yyyy-MM-dd，因此从dd/MM/yyyy转换为yyyy-MM-dd

 var startDate = document.getElementById('ctl00_PlaceHolderMain_ctl00_Date').value;
    var s = new Date(startDate);
    alert(startDate); //which prints out 7/03/2012
    //when i use the below to try and format it to : yyyy-MM-dd which is what i want
    var scurr_date = s.getDate();
    var scurr_month = s.getMonth();
    scurr_month++;
    var scurr_year = s.getFullYear();

出于某种原因，我得到了：

var fstartdate = scurr_year + "-" + scurr_month + "-" + scurr_date;
//Output:2012-7-3
instead of : 2012-3-7
also fi i pick a date like 31/12/2011
i get : 2013-7-12

有什么想法吗?我注意到如果我使用US，比如03/07/2012，它工作正常。提前感谢

Answer 1

你说你想从"dd/MM/yyyy“转换成yyyy-MM-dd。JavaScript的Date构造函数总是以月份作为前两位数字。

一些正则表达式可能会对您有所帮助：

function fix_date (str) {
    var re = /(\d{1,2})\/(\d{1,2})\/(\d{4})/;
    str = str.replace(re, function (p1, p2, p3, p4) {
        return p4 + '/' + p3 + '/' + p2;        
    });

    return str;
}

var start_date = '7/03/2012';
var new_date = fix_date(start_date);

console.log(new_date); // 2012/03/7​

Answer 2

http://www.webdevelopersnotes.com/tips/html/10_ways_to_format_time_and_date_using_javascript.php3

还有这个

http://www.elated.com/articles/working-with-dates/

基本上，你有3个方法，你必须自己组合字符串：

getDate(): Returns the date
getMonth(): Returns the month
getFullYear(): Returns the year

<script type="text/javascript">
  var d = new Date();
  var curr_date = d.getDate();
  var curr_month = d.getMonth() + 1; //months are zero based
  var curr_year = d.getFullYear();
  document.write(curr_date + "-" + curr_month + "-" + curr_year);
</script>

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