Validating jsp page
Because many web applications use JSP pages for the view, Struts also provides custom tag libraries which facilitate interaction with HTML forms.
Payload; @Documented @Constraint(validated By = Phone Validator.class) @Target( ) @Retention(Retention Policy. Employee; public class Employee Form Validator implements Validator utility class for basic validations such as null or empty. Then we need to have Binding Result argument in the method, spring takes care of populating it with error messages. It’s default value is “command” by default, hence we should set it to the model attribute name we are using in our controller classes.
First we need to annotate model object that we want to validate with annotation. Binding Result; import org.springframework.validation. Validator; import org.springframework.validation.annotation. The only important point to note here is the way messages will be looked up, first key name .. Since we are using Spring framework validation implementation, we will have to use Spring Form tags to get the errors and set the form bean and variable names. is used to set the name of the model attribute under which form object is exposed.
Output: while opening display page, all the attributes are getting displayed on client (browser).
When we accept user inputs in any web application, it become necessary to validate them. Phone; public class Customer Notice that we are using @Email, @Not Empty and @Date Time Format annotations that are additional to JSR-303 and provided by hibernate validator implementation. This way we can provide localized error messages to the user. Logger Factory; import org.springframework.stereotype. If we won’t do it, object binding to form data will not take place and our form validation will not work. Based on your input data, you might get different error messages too.