| Enum | Description | 
|---|---|
| ValidatorType | 
ValidatorType | 
| Annotation Type | Description | 
|---|---|
| ConditionalVisitorFieldValidator | |
| ConversionErrorFieldValidator | 
 This validator checks if there are any conversion errors for a field and applies them if they exist. 
 | 
| CreditCardValidator | 
 This validator checks that a field is a valid credit card. 
 | 
| CustomValidator | 
 This annotation can be used for custom validators. 
 | 
| DateRangeFieldValidator | 
 This validator checks that a date field has a value within a specified range. 
 | 
| DoubleRangeFieldValidator | 
 This validator checks that a double field has a value within a specified range. 
 | 
| EmailValidator | 
 This validator checks that a field is a valid e-mail address if it contains a non-empty String. 
 | 
| ExpressionValidator | 
 This non-field level validator validates a supplied regular expression. 
 | 
| FieldExpressionValidator | 
 This validator uses an OGNL expression to perform its validator. 
 | 
| IntRangeFieldValidator | 
 This validator checks that a numeric field has a value within a specified range. 
 | 
| LongRangeFieldValidator | 
 This validator checks that a numeric field has a value within a specified range. 
 | 
| RegexFieldValidator | 
 Validates a string field using a regular expression. 
 | 
| RequiredFieldValidator | 
 This validator checks that a field is non-null. 
 | 
| RequiredStringValidator | 
 This validator checks that a String field is not empty (i.e. 
 | 
| ShortRangeFieldValidator | 
 This validator checks that a numeric field has a value within a specified range. 
 | 
| StringLengthFieldValidator | 
 This validator checks that a String field is of the right length. 
 | 
| UrlValidator | 
 This validator checks that a field is a valid URL. 
 | 
| Validation | Deprecated
 Since Struts 2.1 because it isn't necessary anymore 
 | 
| ValidationParameter | 
 The ValidationParameter annotation is used as a parameter for CustomValidators. 
 | 
| Validations | |
| VisitorFieldValidator | 
 The validator allows you to forward validator to object properties of your action
 using the objects own validator files. 
 | 
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