Constructor Injection

 

 

 

When a bean has a single constructor, @Autowired annotation is no longer needed. 

Use 'final' to make sure that object is not changed after it's initialized 

However,  for Setter injection, you need @Autowired.  

 

 

private final UsersRepository usersRepository;

private final ModelMapper modelMapper;

 

//@Autowired

public UsersController(UsersRepository usersRepository, ModelMapper modelMapper){

    this.usersRepository = usersRepository;

    this.modelMapper = modelMapper;

}

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cs

 

 

reference

https://www.baeldung.com/constructor-injection-in-spring

http://woowabros.github.io/experience/2019/02/28/pilot-project-settle.html