Apache Struts 2 Documentation > Home > Guides > Core Developers Guide > Annotations > RegexFieldValidator Annotation |

Apache Struts 2 Documentation
RegexFieldValidator Annotation
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Added by Rainer Hermanns, last edited by Don Brown on Nov 14, 2006 (view change)

Validates a string field using a regular expression.

## Usage

The annotation must be applied at method level.

## Parameters

Parameter | Required | Default | Notes
--- | --- | --- | ---
message | yes |  | field error message
key | no |  | i18n key from language specific properties file.
fieldName | no |  |
shortCircuit | no | false | If this validator should be used as shortCircuit.
type | yes | ValidatorType.FIELD | Enum value from ValidatorType. Either FIELD or SIMPLE can be used here.

## Examples

    @RegexFieldValidator( key = "regex.field", expression = "yourregexp")