---

layout: core-developers title: email validator

email validator

Description

EmailValidator checks that a given String field, if not empty, is a valid email address.

The regular expression used to validate that the string is an email address is:

\\b^['_a-z0-9-\\+](\\.['_a-z0-9-\\+])@[a-z0-9-](\\.[a-z0-9-])\\.([a-z]{2,6})$\\b

You can also specify expression, caseSensitive and trim params as a OGNL expression, see the example below.

Parameters

• fieldName - The field name this validator is validating. Required if using Plain-Validator Syntax otherwise not required.

Check also documentation of the RegexpValidator for more details - the EmailValidator is based on it.

Warning Do not use ${regexExpression}, ${caseSensitiveExpression} and ${trimExpression} as an expression as this will turn into infinitive loop!

Examples

<!-- Plain Validator Syntax -->
<validators>
    <validator type="email">
        <param name="fieldName">myEmail</param>
        <message>Must provide a valid email</message>
    </validator>
</validators>
 
<!-- Field Validator Syntax -->
<field name="myEmail">
   <field-validator type="email">
      <message>Must provide a valid email</message>
   </field-validator>
</field>
 
<!-- Field Validator Syntax with expressions -->
<!-- Only available when used with xml based configuration, if you want to have the same
        flexibility with annotations use @RegexFieldValidator instead -->
<field name="myEmail">
   <field-validator type="email">
      <param name="regexExpression">${emailPattern}</param> <!-- will be evaluated as: String getEmailPattern() -->
      <param name="caseSensitiveExpression">${emailCaseSensitive}</param> <!-- will be evaluated as: boolean getEmailCaseSensitive() -->
      <param name="trimExpression">${trimEmail}</param> <!-- will be evaluated as: boolean getTrimEmail() -->
      <message>Must provide a valid email</message>
   </field-validator>
</field>