Spring MVC 3 - Neither BindingResult nor plain target object for bean name

Front-end
#1

Buenas amigos do Fórum,

Recentemente comecei a estudar este framework e não consigo resolver um problema que parece relativamente fácil. Procurei na documentação, em tutoriais, enfim… Tentei achar a solução deste erro, mas não acho de jeito nenhum. :shock:

Conferi uma, duas, três vezes mas não vejo onde possa estar errado na configuração para que este erro continue ocorrendo: java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name ‘credential’ available as request attribute.

Aqui vão meus arquivos:

  • web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee web-app_2_4.xsd"
    version="2.4">
  
  <display-name>WebCif</display-name>
  
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>
     	/WEB-INF/webcif-beans.xml
    	/WEB-INF/webcif-jdbc.xml
        /WEB-INF/webcif-services.xml
        /WEB-INF/webcif-dao.xml
    </param-value>
  </context-param>

  <listener>
 	<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  
  <servlet>
 	<servlet-name>webcif</servlet-name>
 	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
 	<load-on-startup>1</load-on-startup>
  </servlet>

  <servlet-mapping>
 	<servlet-name>webcif</servlet-name>
 	<url-pattern>*.htm</url-pattern>
  </servlet-mapping>
  
  <taglib>
    <taglib-uri>http://java.sun.com/jstl/core</taglib-uri>
    <taglib-location>/WEB-INF/tld/c.tld</taglib-location>
  </taglib>
  
  <taglib>
    <taglib-uri>http://java.sun.com/jstl/fmt</taglib-uri>
    <taglib-location>/WEB-INF/tld/fmt.tld</taglib-location>
  </taglib>
  
  <jsp-config>
    <taglib>
      <taglib-uri>/spring</taglib-uri>
      <taglib-location>/WEB-INF/tld/spring-form.tld</taglib-location>
    </taglib>
  </jsp-config>
      
  <welcome-file-list>
	<welcome-file>index.html</welcome-file>
  </welcome-file-list>
  
</web-app>
  • LoginController.java
package br.com.cif.web;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import br.com.cif.core.LoginService;
import br.com.cif.web.vo.LoginCredentialsVO;

@Controller
@RequestMapping(value = "/login")
public class LoginFormController {

	@Autowired
	private LoginService loginService;

	@RequestMapping(method = RequestMethod.POST)
	public String onSubmit(
			@ModelAttribute("credential") LoginCredentialsVO credentials,
			BindingResult result) throws Exception {

		if (result.hasErrors())
			return "login";
		
		loginService.login(credentials.getUsername(),
					credentials.getPassword());

		System.out.println("Username: " + credentials.getUsername());
		System.out.println("Password: " + credentials.getPassword());

		return "home";
	}
}
  • login.jsp
<div id="mainContent">
<c:url  var="logintUrl" value="/login"  />
<form:form modelAttribute="credential" method="POST" action="${logintUrl}">
 	<table border="0" width="100%">
		<tr>
			<td width="35%"></td>
			<td width="10%">Usuário</td>	
			<td width="20%"><form:input path="username"/><form:errors path="username"/></td>
			<td width="35%"></td>
		</tr>
		<tr>
			<td width="35%"></td>
			<td width="10%">Senha</td>
			<td width="20%"><form:input path="password"/><form:errors path="password" /></td>
			<td width="35%"></td>
		</tr>
		<tr>
			<td colspan="4">&#160;</td>
		</tr>
		<tr>
			<td width="35%"></td>
			<td colspan="2" align="center">
				<input type="submit" name="Entrar" value="Entrar"/>
			</td>
			<td width="35%"></td>
		</tr>
		<tr>
			<td colspan="4">&#160;</td>
		</tr>
		<tr>
			<td colspan="4" class="login_error_text">
				<!-- aqui apresentamos a mensagem de erro, se necessario -->
			</td>
		</tr>
	</table>
</form:form>
</div>

Tomara que alguém me ajude encontrar este erro… :slight_smile:
Valeu!

#2

UP!

#3