Code for validating email in java
Keep in mind, though, you'll still have to send a verification email to the address if you want to ensure it's a real email, and that the owner wants it used on your site.If your use case is to validate a user's remote email address, this solution has a considerable flaw (similar to Internet Address.validate()): Email Validator considers [email protected][10.9.8.7] as a valid email addresses - which they are according to the RFC, but maybe not for user registration/contact [email protected], that is documented in Apache COmmons: "This implementation is not guaranteed to catch all possible errors in an email address." And I said what you have to do to "ensure it's a real email". J" = 17 Top-Level-Domain muss 2 Stellen haben null = 1 Eingabestring nicht gesetzt " " = 2 durch TRIM eine Laenge von 0 " A . D " = 12 Leerzeichen innerhalb der e Mail-Adresse "(? ~ characters are legal in the local part of an e-mail address but in the above regular expression those characters are filtered out. It begins with at least one or more word characters including the underscore, equivalent to [A-Za-z0-9_]. Lisa Wollin Microsoft Corporation May 2004 Applies to: Microsoft® Office Front Page® 2003 Microsoft Front Page 2002 Microsoft Front Page 2000 Summary: Learn how validate HTML form fields using Java Script in Microsoft Office Front Page 2003.
Note that Internet Address.validate() considers [email protected][10.9.8.7] and [email protected] as valid email addresses - which they are according to the RFC. But I just tried some code and the following five strings all pass as valid e-mail addresses if you pass them to the Internet Address constructor, and "clearly", they are not valid.
You can provide custom validation for your forms in two ways: server-side validation and client-side validation.