Spring MVC @ModelAttribute getting filled Entity

Today I am stuck with the spring-form with the POST method which doesn't give posted item to the Controller which I wanted. Here is my code.

Controller.java

Code:

---

@Controller
@RequestMapping("/cart")
public class CartController extends CommonController
{
  @RequestMapping(value = "/add", method = RequestMethod.POST)
  public ModelAndView addCart(@ModelAttribute("productList") Item item, BindingResult result,Model model){
      System.out.println(item.getId()); /// <-- doesn't gives me the ID
      return new ModelAndView("cart");
  }
}

---

productList.jsp

Code:

---

/// Loop through the products of search itemlist and generates the forms with the correct items
<c:forEach var="item" items="${productList.items}" varStatus="status">
                <div class="itemTag">${item.name}</div>
                        <a href="<c:url value="/product/${item.name}.html" />" class="moreInfo" ><span>Meer informatie</span></a>
                        <div class="addCart">
                        <c:url value="/cart/add.html" var="addURL" />
                                <form:form method="POST" action="${addURL}" modelAttribute="productList">
                                        <form:hidden path="items[${status.index}].id"/>
                                        <input type="submit" class="addCartBtn" value="Add to cart" />
                                </form:form>
                        </div>
</c:forEach>

---

Backingbean.java

Code:

---

public class SearchForm implements Serializable
{
  private Collection<Item> items;
  private String term;
 
  // getters and setters
}

---

I don't really know what the problem is why it isn't giving me the correct data it passed through the POST.
Many thanks.