How to use Standalone MongoTemplate in Main class

Application.java

@SpringBootApplication
public class Application implements CommandLineRunner {

    @Autowired
    private DeviceRepository deviceRepository;

    public static void main(String[] args) {
        SpringApplication.run(Application.class);
//        MongoOperations mongoOps = new MongoTemplate(new SimpleMongoDbFactory(new MongoClient(), "test"));
//        RepositoryFactorySupport repositoryFactorySupport = new MongoRepositoryFactory(mongoOps);
//        DeviceRepository repo = repositoryFactorySupport.getRepository(DeviceRepository.class);
    }

    @Override
    public void run(String... args) throws Exception {
        List<Device> devices = deviceRepository.findAllByOrg("JJ");
        for (Device device: devices) {
            System.out.println("P: " + device);
        }
    }

}