SpringBoot @Autowired 注入失败 及 Mybatis 注解扫描

@ComponentScan：类注解扫描

@MapperScan：mybatis注解扫描

@ComponentScan("com.spring")
@MapperScan("com.spring.test.dao")
@SpringBootApplication
public class BlogApplication {

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

}