Cześć.
Próbuję napisać obsługę formularza w Springu za pomocą adnotacji @ModelAttribute, walidacja jest w 'obieckie transferowym' (?) Ale wypluwa mi ciągle wyjątek: java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'formDto' available as request attribute.
Szukałem na Stacku, ale nie bardzo te odpowiedzi działają cały czas to samo...
Znalazłem tutaj wzmiankę o tym : http://www.baeldung.com/spring-mvc-form-tutorial , ale adnotacje mam wpisaną, próbowałem również na piechotę dodać obiekt z walidacją "formDto" jako atrybut do modelu, nic to nie dało.
Wskazuje na 7 linijke w jsp, przy deklaracji formularza, zmieniłem nawet modelAttribute na commandName chociaż to bez sensu...
Kontroler:
@Controller
public class CatsController {
@Autowired
private CatDAO dao;
@RequestMapping(value = "/list", method = RequestMethod.GET)
public String showListOfCats(ModelMap modelMap) {
modelMap.addAttribute("cats", dao.getCats());
return "catsList";
}
@RequestMapping(value = "/add", method = RequestMethod.GET)
public String showForm() {
return "addCat";
}
@RequestMapping(value = "/add", method = RequestMethod.POST)
public String addCatsDetails(@ModelAttribute ("formDto") @Valid FormDTO formDto, BindingResult result, ModelMap model){
if (!result.hasErrors()) {
Cat kitten = new Cat();
kitten.setCatName(formDto.getCatName());
kitten.setGuardian(formDto.getGuardian());
kitten.setWeight(formDto.getWeight());
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("dd.MM.yyyy");
try {
kitten.setDate(simpleDateFormat.parse(formDto.getDate()));
} catch (ParseException e) {
e.printStackTrace();
}
dao.addCat(kitten);
model.clear();
return "redirect:/details";
}return "addCat";
}
@RequestMapping(value = "/details", method = RequestMethod.GET)
public String showDetails (ModelMap modelMap, @RequestParam Integer id) {
modelMap.addAttribute("catById", dao.getCatById(id));
return "details";
}
}
JSP:
<%@include file="common/header.jspf"%>
<div class="container">
<h2>Cat's details</h2>
<c:set var="ifPost" value="${pageContext.request.method=='POST'}"/>
<form:form method="post" modelAttribute="formDto" action="/add">
<div class="form-group">
<form:label path="catName">Cat's name</form:label>
<form:input path="catName" type="text" class="form-control" placeholder="Enter your cat's name" />
<c:if test="${ifPost}"><form:errors path="catName" cssClass="error"></form:errors></c:if>
</div>
<div class="form-group">
<form:label path="guardian">Guardian's cat</form:label>
<form:input path="guardian" type="text" class="form-control" placeholder="Enter guardian's name"/>
<c:if test="${ifPost}"><form:errors path="guardian" cssClass="error"></form:errors> </c:if>
</div>
<div class="form-group">
<form:label path="weight" >Weight</form:label>
<form:input path="weight" type="number" class="form-control" placeholder="Enter cat's weight"/>
<c:if test="${ifPost}"><form:errors path="weight" cssClass="error"></form:errors> </c:if>
</div>
<div class="form-group">
<form:label path="date" >Date of Birth</form:label>
<form:input path="date" type="text" class="form-control" placeholder="Enter cat's date of birth dd.MM.yyyy"/>
<c:if test="${ifPost}"><form:errors path="date" cssClass="error"></form:errors></c:if>
</div>
<div>
<input path="submit" type="submit" class="btn btn-default" value="Submit">
</div>
</form:form>
</div>
<%@include file="common/footer.jspf"%>
Klasa z walidacją:
public class FormDTO {
@NotEmpty
@Size(min=3)
private String catName;
@NotEmpty
@Size(min=4)
private String guardian;
@NotEmpty
@Range(min = 1, max = 10)
private double weight;
@NotEmpty
@DateTimeFormat(pattern = "dd.MM.yyyy")
@Min(1)
@Max(20)
private String date;
public String getCatName() {
return catName;
}
public void setCatName(String catName) {
this.catName = catName;
}
public String getGuardian() {
return guardian;
}
public void setGuardian(String guardian) {
this.guardian = guardian;
}
public double getWeight() {
return weight;
}
public void setWeight(double weight) {
this.weight = weight;
}
public String getDate() {
return date;
}
public void setDate(String date) {
this.date = date;
}
}
Spring MVC 