How does autowiring work in Spring?

Question

I\'m a little confused as to how the inversion of control (IoC) works in Spring.

Say I have a service class called UserServic

Answer 1

You just need to annotate your service class UserServiceImpl with annotation:

@Service("userService")

Spring container will take care of the life cycle of this class as it register as service.

Then in your controller you can auto wire (instantiate) it and use its functionality:

@Autowired
UserService userService;