求正则表达式

Question

1、^[\u4e00-\u9fa5]{2,19}|[a-zA-Z]{3,38}$
2、^[\d]{2,16}$
3、日期的话 还是别用正则吧.

Answer 1

// ^(?i)([\u4e00-\u9fa5]{2,19}|[a-z]{3,38})$
// ^\d{2,16}$
//^(?:(?!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}))?$

Answer 2

// ^(?i)([\u4e00-\u9fa5]{2,19}|[a-z]{3,38})$
// ^\d{2,16}$
//^(?:(?!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}))?$搭个车，版主，我也想用正则来判断，byte数组的第一个字节和第三个字节是否分别为'[' ']'