ne pouvait pas autowire champ spring-boot

Besoin d'aide, je suis juste de commencer à apprendre le Printemps et n'arrive pas à comprendre ce que nous avons tort:

Application.java - pas de forfait

@Configuration
//@ComponentScan({"com.mapping","com.accesors","com.controllers"}) --Originaly tried this
@ComponentScan(basePackageClasses={UserDAO.class,Root.class,User.class})
@EnableAutoConfiguration
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

User.java - package com.cartographie

@Entity
public class User {

    @Id
    @GeneratedValue
    private Long id;
    private String userName;
    private String password;
    //accesors
}

UserDAO.java - package com.accesors

@Repository
public interface UserDAO extends JpaRepository<User, Long> {

}

Root.java - package com.les contrôleurs de

@Controller
@RequestMapping("/*")
public class Root {

    @Autowired
    UserDAO userDAO;

    @RequestMapping("/")
    @ResponseBody
    public String rootAction(@RequestParam(defaultValue="foo") String name){
        List<User> lst = this.userDAO.findAll();
        for(User u : lst){
            System.out.println(u);
        }
        return "hello, " + name;
    }

}

Et j'ai l'impression à obtenir la exeption quand je lance le projet

Stacktrace:

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'root': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: com.accesors.UserDAO com.controllers.Root.userDAO; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.accesors.UserDAO] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:292)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1185)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:703)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:120)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:691)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:320)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:952)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:941)
at demo.Application.main(Application.java:14)

De ce que je comprends, cela signifie que @ComponentScan n'est pas détecter les paquets

Donc, ce qui met en œuvre UserDao?
Rien, c'est le Printemps-Data-JPA voir petrikainulainen.net/spring-data-jpa-tutorial
Si je me souviens bien, Spring-Data-JPA utilise aspects pour créer la classe au moment de l'exécution

OriginalL'auteur Ricardo Garza V. | 2014-07-09