[FIXED] Spring validator never called

Issue

I am trying to validate some information, so I added a validator and used @Valid in the parameter of the post method:

@Controller
@RequestMapping("/user.htm")
public class UserController {

    @Autowired
    private IUserService userService;

    @RequestMapping(method = RequestMethod.GET)
    public String userInfo(Model model) {
       ....
        return "user";
    }

    @RequestMapping(method = RequestMethod.POST)
    public String userInfoResult(@Valid @ModelAttribute UserForm userForm, BindingResult result, Model model ) {

        UserInfo stat = userService.getStatitisque(userForm.getSearchCritera());
        userForm.setListeExpediteur(listeExpediteur);

        userForm.setUserInfo(stat);
        model.addAttribute("userForm", userForm);
    }    
}

public class UserFormValidator implements Validator {

    @Override
    public boolean supports(Class<?> type) {
        return UserForm.class.equals(type);
    }

    @Override
    public void validate(Object o, Errors errors) {
        UserForm userForm = (User) o;
        ...
    }
}

When I debug, I never go in the UserFormValidator class.

Do I need to add something in these files?

• web.xml
• applicationContext.xml
• dispatcher-servlet.xml

Solution

You need to add the validator in an @InitBinder method:

@InitBinder(value="YourFormObjectName")
protected void initBinder(WebDataBinder binder) {
    binder.setValidator(new FooValidator());
}

or globally via XML:

<mvc:annotation-driven validator="globalValidator"/>

Reference:

• 5.7.4.2 Configuring a Validator for use by Spring MVC

Answered By - Sean Patrick Floyd
Answer Checked By - Pedro (JavaFixing Volunteer)