User input validations are integral part of any web application. With the release of Struts 2, validation are now much easier and robust. Struts 2 support Ajax based and even server side validations. Struts 2.0 action relies on the XWork validation framework. The XWork framework runs the validation rules before executing the action. Struts 2 also provides the facility to define validation rules in your action class using Java 5 annotations.
Validation (Int Validator)
Struts 2 Framework provides in-built validation functions to validate user inputs. These validation functions are sufficient for any normal web application.
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