Regex validation in java and java scipt for email address

Question

We are using below regular expression to validate email address in java ^[\\w!#\\$'\\*\\+=\\?\\^\\/_~-]+(\\.[\\w!#\\$'\\*\\+=\\?\\^\\/_~-]+)*@([a-zA-Z0-9\\-]+\\.)+[A-Z]{2,4}$ and it worked fine with invalid email address [email protected]&^(*&^(*^2 but when I use the same regular expression in javascript , it doesn't work and failes with even valid email addresses . Please suggest what could be root cause of this mismatch?

for e.g. in javascript , I'm getting false value with below test conditional -

/^[\w!#\$'\*\+=\?\^\/~-]+(\.[\w!#\$'\*\+=\?\^\/~-]+)*@([a-zA-Z0-9\-]+\.)+ [A-Z]{2,4}$/.test("[email protected]")

possible duplicate of Using a regular expression to validate an email address — Qantas 94 Heavy
– Qantas 94 Heavy, Commented Oct 27, 2014 at 9:59
sorry but it is not a duplicate . i can google and get regex from internet but my requirement is to use same regrx as used in java program which is not working . — Raj
– Raj, Commented Oct 27, 2014 at 10:03

nhahtdh · Accepted Answer · 2014-10-27 10:08:59Z

3

You need to convert \\ to \ in Javascript regex literal:

/^[\w!#$'*+=?^\/~-]+(\.[\w!#$'*+=?^\/~-]+)*@([a-zA-Z0-9-]+\.)+[A-Z]{2,4}$/i.test("[email protected]")

Also many special regex characters like $, +, * etc. don't need to be escaped inside character class hence I have removed unnecessary escaping from your character class.

edited Oct 27, 2014 at 10:08

nhahtdh

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answered Oct 27, 2014 at 9:53

anubhava

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2 Comments

Raj Over a year ago

/^[\w!#$'*+=?^\/~-]+(\.[\w!#$'*+=?^\/~-]+)*@([a-zA-Z0-9-]+\.)+[A-Z]{2,4}$/.test("[email protected]") - still i'm getting false when i ran this in java script console

anubhava Over a year ago

It works here Make sure you use i (ignore case) flag.

ajitksharma · Accepted Answer · 2014-10-27 10:12:51Z

0

Try this, it works for me.

/^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,6})$/.test('[email protected]');

<html>

<body>
  <script>
    var flag = /^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,6})$/.test('[email protected]');
  </script>
  <h5><script>document.write(flag)</script></h5>
</body>

</html>

edited Oct 27, 2014 at 10:12

answered Oct 27, 2014 at 10:06

ajitksharma

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