Spring tags form do not show validation errors in jsp - spring

Question

I am writing a page with user registration. Faced a display problem in the form of validation errors
My Controller:
#Controller
public class UIController {
private final Logger log = LoggerFactory.getLogger(getClass());
#Autowired
private UserService service;
#Autowired
private SecurityService securityService;
#Autowired
private UserValidator validator;
#PostMapping(value = "/login")
public String signIn(#ModelAttribute("userForm") UserTo userForm, BindingResult bindingResult, Model model) {
validator.validate(userForm, bindingResult);
User user = service.findByLogin(UserUtil.createNewFromTo(userForm).getLogin());
if (!userForm.getPassword().equals(user.getPassword())) {
log.info("invalid password {}", user);
return "redirect:/login";
}
log.info("signIn {}", user);
securityService.autologin(user.getLogin(), user.getPassword());
return "redirect:/welcome";
}
}
My Validator:
#Component
public class UserValidator implements Validator {
#Autowired
private UserRepositoryImpl userRepository;
#Override
public boolean supports(Class<?> aClass) {
return UserTo.class.equals(aClass);
}
#Override
public void validate(Object o, Errors errors) {
UserTo user = (UserTo) o;
ValidationUtils.rejectIfEmptyOrWhitespace(errors, "login", "NotEmpty");
if (user.getLogin().length() < 6 || user.getLogin().length() > 32) {
errors.rejectValue("login", "Size.userForm.login");
}
if (userRepository.findByLogin(user.getLogin()) != null) {
errors.rejectValue("login", "Duplicate.userForm.login");
}
ValidationUtils.rejectIfEmptyOrWhitespace(errors, "password", "NotEmpty");
if (user.getPassword().length() < 8 || user.getPassword().length() > 32) {
errors.rejectValue("password", "Size.userForm.password");
}
}
}
My jsp form :
<div id="wrapper">
<!--SLIDE-IN ICONS-->
<div class="user-icon"></div>
<div class="pass-icon"></div>
<!--END SLIDE-IN ICONS-->
<!--LOGIN FORM-->
<form:form name="login-form" modelAttribute="userForm" class="login-form" method="post" id="form">
<input type="hidden" name="${_csrf.parameterName}" value="${_csrf.token}"/>
<!--CONTENT-->
<div class="content">
<!--USERNAME-->
<spring:bind path="login">
<div class="form-group ${status.error ? 'has-error' : ''}">
<form:input name="login" id="login" type="text" path="login" class="input username"
placeholder="Login"></form:input>
<form:errors path="login"></form:errors>
</div>
</spring:bind>
<!--END USERNAME-->
</div>
<!--END CONTENT-->
<!--FOOTER-->
<div class="footer">
<button class="button" type="submit">Login</button>
<button class="register" type="button" name="submit" onclick=" register_url('${contextPath}/registration')">
Register
</button>
</div>
<!--END FOOTER-->
</form:form>
</div>
When debugging in chrome when sending a POST request, a 302 HTTP error appears.
Accordingly, if I set a breakpoint in the controller, then the debug is not processed.
Tell me what could be the problem?

Answer 1

The "form" tag in your jsp does not have "action" attribute.

Answer 2

You should not redirect on errors, because the redirect will erase the binding result. Instead do :
if (!userForm.getPassword().equals(user.getPassword())) {
log.info("invalid password {}", user);
return "login";
}