javascript javascript中用于日期验证的正则表达式

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时间:2020-10-27 04:45:26  来源:igfitidea点击:

Regex for Date Validation in javascript

javascriptjqueryasp.net-mvcregexvalidation

提问by User_MVC

pls can somebody give the date validation regex, which will allow the following rules are

请有人提供日期验证正则表达式,这将允许以下规则

  1. It should allow mm/dd/yyyy, m/d/yyyy, mm/d/yyyy, m/d/yyyy(not allow yy)
  2. Number of days for month (30 and 31) validation.
  3. Feb month validation for leap & non leap years.
  1. 它应该允许mm/dd/yyyy、m/d/yyyy、mm/d/yyyy、m/d/yyyy(不允许 yy)
  2. 月(30 和 31)验证的天数。
  3. 闰年和非闰年的二月验证。

采纳答案by Mr_Green

Try this:

试试这个:

([0-9][1-2])/([0-2][0-9]|[3][0-1])/((19|20)[0-9]{2}) 

and then if you got a valid string from the above regex then with string manipulations, do something like below:

然后如果你从上面的正则表达式中得到一个有效的字符串,然后进行字符串操作,请执行以下操作:

if(/([0-9][1-2])\/([0-2][0-9]|[3][0-1])\/((19|20)[0-9]{2})/.test(text)){
    var tokens = text.split('/');  //  text.split('\/');
    var day    = parseInt(tokens[0], 10);
    var month  = parseInt(tokens[1], 10);
    var year   = parseInt(tokens[2], 10);
}
else{
    //show error
    //Invalid date format
}

回答by Anirudha

Don't try to parse date entirelywith regex!Follow KISSprinciple..

不要尝试使用正则表达式完全解析日期!遵循KISS原则..

1>Get the dates with this regex

1>使用这个正则表达式获取日期

^(\d{1,2})/(\d{1,2})/(\d{2}|\d{4})$

2> Validate month,year,day if the string matches with above regex!

2> 如果字符串与上面的正则表达式匹配,则验证月、年、日!

var match = myRegexp.exec(myString);
parseInt(match[0],10);//month
parseInt(match[1],10);//day
parseInt(match[2],10);//year

回答by ic3b3rg

Here's a full validation routine

这是一个完整的验证程序

var myInput = s="5/9/2013";
var r = /^(\d{1,2})\/(\d{1,2})\/(\d{4})$/;
if(!r.test(myInput)) {
  alert("Invalid Input");
  return;
}
var a = s.match(r), d = new Date(a[3],a[1] - 1,a[2]);
if(d.getFullYear() != a[3] || d.getMonth() + 1 != a[1] || d.getDate() != a[2]) {
  alert("Invalid Date");
  return;
}

// process valid date