Difference between @Autowired and new

@Autowired is equivalent to a setter. Before injection, the object has been instantiated, which is instantiated when the interface is annotated;
while new only instantiates an object, and the new object cannot call other injected classes
eg:
1. Controller

@controller
public class BusinessShopShoesController extends BaseController {

    @Autowired
    private ShoesService shoesService;//equivalent to setter, already instantiated
    }

2. Business layer

@service
public class ShoesService extends CrudService<ShoesDao, Shoes> {

    @Autowired
    ShoesModelDao shoesModelDao;
    @Transactional(readOnly = false)
    public Shoes get(int id)
    {
        return shoesModelDao.get(id);
    }  
    }

If there is a new service in 1, then Dao in 2 cannot be called, because DAO is dependency injection