Witam,, serdecznie,

przerabiam właśnie validatory w springu mvc i mam problem z działaniem takowego - w form przechodzi nawet jeśli lastName który wysyłany jest nullem. Może brakuje mi cos w mavenie, może jakaś literówka. Proszę o pomoc. Zamieszczam kod:
Maven:

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-validator</artifactId>
            <version>6.0.13.Final</version>
        </dependency>

        <dependency>
            <groupId>javax.validation</groupId>
            <artifactId>validation-api</artifactId>
            <version>2.0.0.Final</version>
        </dependency>
    </dependencies>

Customer:


import javax.validation.constraints.NotBlank;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;

public class Customer {
    private String firstName;

    @NotNull
    @Size(min = 1, message = "is required")
    private String lastName;

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }
}

Controller:


import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;


import javax.validation.Valid;

@Controller
@RequestMapping("/customer")
public class CustomerController {

    @RequestMapping("/showform")
    public String showForm(Model model){

        model.addAttribute("customer", new Customer());
        return "customer-form";
    }

    @RequestMapping("/processForm")
    public String processForm(@Valid @ModelAttribute("customer") Customer customer, BindingResult bindingResult){

        if(bindingResult.hasErrors()){
            return "customer-form";
        }else{

        return "customer-comf";}
    }

}

.jsp

<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>

<html>
<head>
    <title>Formularz klienta</title>
    <style>
        .error {
            color: red
        }
    </style>
</head>
<body>
Wypełnij forumlarz zgłoszeniowy (* pola są wymagane)
<br><br/>
<form:form action="processForm" modelAttribute="customer">
    Imię: <form:input path="firstName"></form:input>
    <br><br/>
    Nazwisko (*)<form:input path="lastName"></form:input>
    <form:errors path="lastName" cssClass="error"></form:errors>
    <br><br/>
    <input type="submit" value="Wyślij zgłoszenie">
</form:form>

</body>
</html>