email validation in java without regular expression

The inter-domain name format is as follows: Domain names are composed of specific character sets, English letters, numbers, and "-" (that is, hyphens or minus signs) of each country's text, but neither the beginning nor the end can contain "-", "-" and "-" cannot appear continuously. The letters in the domain name are not case-insensitive. The domain name can be up to 60 bytes (including suffix. com,. NET,. org, and so on). /^[a-z] ([a-z0-9]*[-_]?[ a-z0-9]+) *@ ([a-z0-9]*[-_]?[ a-z0-9]+) +[\.]

Try testing the following form with valid and invalid email addresses. The Code uses JavaScript to match the users input with a regular expression. Function code: Copy Code code as follows: function Validate (Form_id,email) { var reg =/^ ([a-za-z0-9_\-\.]) +\@ ([a-za-z0-9_\-\.]) +\. ([a-za-z]{2,4}) $/

The regular expression (regular expression) describes a pattern of string matching that can be used to check whether a string contains a seed string, replace a matched substring, or remove a substring from a string that matches a certain condition. This article mainly introduces the PHP

Try testing the following form with valid and invalid email addresses. Code uses javascript to match the users input with a regular expression. Function Code: Copy codeThe Code is as follows: function validate (form_id, email ){ Var reg =/^ ([A-Za-z0-9 _ \-\.]) + \ @ ([A-Za-z0-9 _ \-\.]) + \. ([A-Za-z] {2, 4}) $ /; Var

= [nspredicatepredicatewithformat:@ "selfmatches%@",cartyperegex]; return[cartestevaluatewithobject:cartype];} //User name + (BOOL) validateusername: (nsstring*) name{nsstring *usernameregex=@ "^[a-za-z0-9]{6,20}+$"; nspredicate* Usernamepredicate=[nspredicatepredicatewithformat:@ "selfmatches%@",userNameRegex]; BOOLB=[userNamePredicateevaluateWithObject:name]; Returnb;} //password + (BOOL) validatepassword: (nsstring*) password{nsstring *passwordregex=@ "^[a-za-z0-9]{6,20}+$"; nspredicate* pass

=@"^[A-Za-z0-9]{6,20}+$";NSPredicate*userNamePredicate=[NSPredicatepredicateWithFormat:@"SELFMATCHES%@",userNameRegex];BOOL B=[userNamePredicateevaluateWithObject:name];returnB;}//密码+(BOOL)validatePassword:(NSString*)passWord{NSString*passWordRegex=@"^[a-zA-Z0-9]{6,20}+$";NSPredicate*passWordPredicate=[NSPredicatepredicateWithFormat:@"SELFMATCHES%@",passWordRegex];return[passWordPredicateevaluateWithObject:passWord];}//昵称+(BOOL)validateNickname:(NSString*)nickname{NSString*nicknameRegex=@"^[\u4e

JavaScript Tutorials Phone, QQ, mobile phone, ID number, email address, post regular expression validation code

This example needs to verify the content: E-mail address, URL address, telephone number, ZIP code, verification method for everyone to share for reference, the specific content as follows 1. Verification of e-mail address 2, the URL address of the check 3. Telephone number 4, the verification of the ZIP code I hope this article will help you learn PHP programming. The above describes the PHP regular