Regex Pattern for password field

Question

I have a password field where I want to have atleast one special character, atleast one uppercase character and atleast one numeric digit. Can anyone help me with the regex pattern please.

Thank You

I dont understand why this question has been upvoted! I cant see any effort from the OP's side. — vikiiii
– vikiiii, Commented Jul 17, 2012 at 9:26
Do you really want to enforce this? People will just add an uppercase at the start, and a 1$ at the end. Not sure enforcing this actually increases security. Password1$ isn't any more secure than password. — Nick
– Nick, Commented Jul 17, 2012 at 9:27

Keppil · Accepted Answer · 2012-07-17 09:30:17Z

4

Pattern pwPattern = Pattern.compile("(?=.*[@#$!\"&])(?=.*[A-Z]).*\\d.*");

Add more special characters inside the first brackets if you want to allow more, I just added a few.

Use it like this:

if (pwPattern.matcher(passWordToTest).matches()) {
  ...
}

edited Jul 17, 2012 at 9:30

answered Jul 17, 2012 at 9:24

Keppil

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7 Comments

Nick Over a year ago

Doesn't this have to end in a digit?

Fabian Barney Over a year ago

+1 But for me it also works without .* at the end even when the pw does not end with a digit.

Tim Pietzcker Over a year ago

@FabianBarney: Not in Java when using .matches().

Tim Pietzcker Over a year ago

@user1530678: If you want to insert ^ into the character class, do it at the end of the class; if you insert -, do it at the start. Otherwise they change the meaning of what's in the class.

Fabian Barney Over a year ago

@TimPietzcker Ah ok, I used .find() in my test.

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