Validation

By default, if Bean Validation is present on the classpath (for example, Hibernate Validator), the LocalValidatorFactoryBean is registered as a global Validator for use with @Valid and @Validated on controller method arguments.

You can customize the global Validator instance, as the following example shows:

@Configuration
public class WebConfiguration implements WebMvcConfigurer {

  @Override
  public Validator getValidator() {
    Validator validator = new OptionalValidatorFactoryBean();
    // ...
    return validator;
  }
}

Note that you can also register Validator implementations locally, as the following example shows:

public class FooValidator implements Validator {

  @Override
  public boolean supports(Class<?> clazz) {
    return false;
  }

  @Override
  public void validate(Object target, Errors errors) {
  }
}

@Controller
public class MyController {

  @InitBinder
  public void initBinder(WebDataBinder binder) {
    binder.addValidators(new FooValidator());
  }
}

If you need to have a LocalValidatorFactoryBean injected somewhere, create a bean and mark it with @Primary in order to avoid conflict with the one declared in the MVC configuration.