I'm new in spring (spring 3.1.2, hibernate 4, mysql 5.1).

I'm trying to test a simple service by using java configuration:

HTML Code:
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = { MyConfig .class })
public class UserServiceTest {
	
	
	@Autowired
	private UserService userService;
	
	@Test
  public void testUserService() {
		List<User> user = userService.listUsers();
		assertEquals(2, user.size());
	}
}
But this error is thrown ... I've read several posts with the same error but I didn't find the solution... If someone have any idea , it would be great.

HTML Code:
org.hibernate.HibernateException: No Session found for current thread
	at org.springframework.orm.hibernate4.SpringSessionContext.currentSession(SpringSessionContext.java:97)
	at org.hibernate.internal.SessionFactoryImpl.getCurrentSession(SessionFactoryImpl.java:941)
	at com.my.xxx.dao.UserDaoImpl.listUsers(UserDaoImpl.java:29)
	at com.my.xxx.service.UserServiceImpl.listUsers(UserServiceImpl.java:27)
	at com.my.xxx.service.UserServiceTest.testUserService(UserServiceTest.java:28)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
	at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)
	at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:83)
	at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:231)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
	at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
	at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:71)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:174)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

The java configuration :
HTML Code:
@Configuration
@ComponentScan(basePackages = {"com.my.xxx.dao","com.my.xxx.service"})
public class MyConfig {
	private static final Logger logger = LoggerFactory.getLogger(MyConfig.class);

	@Bean
	public SessionFactory sessionFactory() {
		SessionFactory mySessionFactory = new LocalSessionFactoryBuilder(datasource()).addAnnotatedClasses(User.class).buildSessionFactory();
		return mySessionFactory;
	}

	@Bean
	public PlatformTransactionManager transactionManager() {
		return new HibernateTransactionManager(sessionFactory());
	}

	@Bean
	public Properties hibernateProperties() {
		Properties properties = new Properties();
		properties.put("hibernate.dialect", "org.hibernate.dialect.MySQL5Dialect");
		properties.put("hibernate.show_sql", "true");
		properties.put("hibernate.hbm2ddl.auto", "create");
		return properties;
	}

	@Bean
	public DataSource datasource() {
		Properties props = new Properties();
		try {
			props.load(this.getClass().getClassLoader().getResourceAsStream("datasource-xxx.properties"));
		} catch (IOException e) {
			logger.error("Error while loading xxx-spring properties", e);
		}
		DriverManagerDataSource dataSource = new DriverManagerDataSource();
		dataSource.setDriverClassName(props.getProperty("database.driver"));
		dataSource.setUrl(props.getProperty("database.url"));
		dataSource.setUsername(props.getProperty("database.username"));
		dataSource.setPassword(props.getProperty("database.password"));
		dataSource.setConnectionProperties(hibernateProperties());
		return dataSource;
	}

}
My service :
HTML Code:
@Service
@Transactional
public class UserServiceImpl implements UserService {

	@Autowired
	private UserDao userDao;

	@Override
	public void addUser(User user) {
		userDao.addUser(user);

	}

	@Override
	public List<User> listUsers() {
		return userDao.listUsers();
	}

	@Override
	public void removeUser(User user) {
		// TODO Auto-generated method stub

	}


}
My DAO :
HTML Code:
@Repository
@Transactional
public class UserDaoImpl implements UserDao {

	@Autowired
  private SessionFactory sessionFactory;
	

	@Override
	public void addUser(User user) {
		// TODO Auto-generated method stub

	}

	@SuppressWarnings("unchecked")
	@Override
	public List<User> listUsers() {
		List<User> users = (List<User>)sessionFactory.getCurrentSession().createSQLQuery("select * from Users").list();
		return (List<User>)  sessionFactory.getCurrentSession().createQuery("from User")
        .list();
	}

	@Override
	public void removeUser(User user) {
		// TODO Auto-generated method stub
		
	}

	
}
My entity :
HTML Code:
@Entity
@Table(name = "Users")
public class User implements Serializable {

	@Id
	@Column(name = "u_id")
	@GeneratedValue
	private Integer id;
	
	@Column(name="u_lastname")
	String name;
	
	@Column(name="u_firstname")
	String firstname;

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getFirstname() {
		return firstname;
	}

	public void setFirstname(String firstname) {
		this.firstname = firstname;
	}

}