Regular Expression for field must contain at least 2 non-space alphanumeric characters

问题

Rule: field must contain at least 2 non-space alphanumeric characters.

please any one can guide us how to write the regular expression

thanks in advance....

回答1:

Match one alphanumeric character followed by zero or more characters followed by another alphanumeric character:

\w.*\w

If the validation automatically adds ^ and $, you have to match the characters before and after also:

.*\w.*\w.*

The \w code matches A-Z, a-z, 0-9 and _. If you have a different definition for aplhanumeric characters, you can use a set of characters instead, for example:

[A-Za-z0-9].*[A-Za-z0-9]

来源：https://stackoverflow.com/questions/2244516/regular-expression-for-field-must-contain-at-least-2-non-space-alphanumeric-char