Java tutorial
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package CRM.Validation; import CRM.objects.users; import java.util.logging.Logger; import org.springframework.stereotype.Component; import org.springframework.validation.Errors; import org.springframework.validation.ValidationUtils; import org.springframework.validation.Validator; /** * * @author calho */ @Component public class UserValidation implements Validator { private static final Logger logger = Logger.getLogger(UserValidation.class.getName()); @Override public boolean supports(Class<?> clazz) { return users.class.isAssignableFrom(clazz); } @Override public void validate(Object target, Errors errors) { ValidationUtils.rejectIfEmptyOrWhitespace(errors, "username", "Users.username.required"); ValidationUtils.rejectIfEmptyOrWhitespace(errors, "password", "Users.password.required"); } }