Spring如何将bean添加到容器中

<!--配置mybatis的mapper扫描包-->
  <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="basePackage" value="myblog.dao"></property>
  </bean>

@Service
@Transactional
public class BlogServiceImpl implements BlogService {
  @Autowired
  private BlogDao blogDao;
  @Override
  public List<Blog> findAll() {
    return blogDao.findAll();
  }

  @Override
  public void insertUserAndBlog(Integer blogId, Integer userId) {
    blogDao.insertUserAndBlog(blogId,userId);
  }

  @Override
  public void insertBlog(Blog blog) {
    blogDao.insert(blog);

  }

  @Override
  public void update(Blog blog) {
    blogDao.update(blog);
  }

  @Override
  public void delete(Blog blog) {
   blogDao.delete(blog);
  }

  @Override
  public Blog findById(Integer id) {
    PageHelper.startPage(1, 6);
    return blogDao.findById(id);
  }

  @Override
  public List<Blog> findBlogByUserId(Integer userId) {
    PageHelper.startPage(1, 6);
    return blogDao.findBlogByUser(userId);
  }
}

@Configuration
public class ApplicationContextConfig {
  @Bean
  @LoadBalanced
  public RestTemplate getRestTemplate(){
    RestTemplate restTemplate=new RestTemplate();
    return restTemplate;
  }
}