Email Address using java regular expression

[nav katoch]

Hi team,

I am using the following pattern to validate my email address:-
static String EMAIL_MATCH_REG = "^[_A-Za-z0-9-]+(\\.[_A-Za-z0-9-]+)*@[A-Za-z0-9]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$";
which is working fine for
Valid email addresses:
[email protected] OK
[email protected] OK
much."more\ unusual"@example.com How this one?
very.unusual."@"[email protected] How this one?
very."(),:;<>[]".VERY."very\\\ @\"very"[email protected] How this one?

Please help me out.

Thanks,

Naveen Katoch

[nav katoch]

With this one
static String EMAIL_MATCH_REG = "^[_A-Za-z0-9-]+(\\.[_A-Za-z0-9-\\\\\"\\s]+)*@[A-Za-z0-9]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$";

This one is working too
much."more\ unusual"@example.com OK now.

Thanks,

Naveen

[Pat Farrell]

how correct do you want to be? A legal email address can take lots of form, the spec is RFC822.

I use the Apace Common library to do it. No point in reinventing the wheel.

[Paul Clapham]

Absolutely. You're just guessing at the rules, and if you do that then one day you're going to seriously annoy somebody by telling them their e-mail address isn't valid. If you really have to validate e-mail addresses (and you should try to design your system so you don't have to) then like Pat says, at least use code written by somebody who knows what they are doing.

[Rob Spoor]

JavaMail with its InternetAddress is also an often-used library for parsing / validating email addresses.

[nav katoch]

Thank you so much for all your inputs. I appreciate it.

Naveen