在JavaScript中使用正则表达式检查日期并根据给定类型进行转换

Question

I have requirement that a text box is filled with a date using a JQuery Date-picker and the date will be entered in any format but when it passes to a JSON webservice,

• Date must be converted to the yy-mm-dd (ex. 2014-04-15) format.
• This must be done using Regular expressions in JavaScript. The RegEx must check the format and if it is in the right or wrong format the inserted date must be converted to the above mentioned format.

So how can I do that?

Answer 1

yyyy-mm-dd

var reg=/^(?:(?!0000)[0-9]{4}[-](?:(?:0[1-9]|1[0-2])[-](?:0[1-9]|1[0-9]|2[0-8])|(?:0[13-9]|1[0-2])[-](?:29|30)|(?:0[13578]|1[02])[-]31)|(?:[0-9]{2}))?$/;

yy-mm-dd

var reg=/^(?:(?!00)[0-9]{2}[-](?:(?:0[1-9]|1[0-2])[-](?:0[1-9]|1[0-9]|2[0-8])|(?:0[13-9]|1[0-2])[-](?:29|30)|(?:0[13578]|1[02])[-]31)|(?:[0-9]{2}))?$/;