Apache Struts 2 Documentation
RequiredStringValidator Annotation
This validator checks that a String field is not empty (i.e. non-null with a length > 0).
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. |
| trim | no | true | Boolean property. Determines whether the String is trimmed before performing the length check. |