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Apache Struts 2 Documentation
RequiredFieldValidator Annotation
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This validator checks that a field is non-null.

## 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.
messageParams | no |  | Additional params to be used to customize message - will be evaluated against the Value Stack
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