A method with @Bean autowires without @Autowired

Question

In my Java Config file there is

@Bean
public CDPlayer cdPlayer(CompactDisc compactDisc){
    return new CDPlayer(compactDisc);
}

My book says that the (singleton) CompactDisc is autowired into the method. Why? Because I do not see @Autowired. How can this work?

Starting with Spring 4.3 you don't need to use @Autowired annotation to inject dependency — Marcin Bukowiecki, Jun 12 '18 at 13:56
This question explain the difference between the two : https://stackoverflow.com/questions/34172888/difference-between-bean-and-autowired — RoadEx, Jun 12 '18 at 15:28

score 5 · Answer 1 · edited Jun 20 '20 at 09:12

5

About @Bean in Spring

A @Bean annotated method can have an arbitrary number of parameters describing the dependencies required to build that bean

The resolution mechanism is pretty much identical to constructor-based dependency injection, see the relevant section for more details.

Every parameter in a @Bean method will be resolved (injected by Spring container).

edited Jun 20 '20 at 09:12

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answered Jun 12 '18 at 14:00

Mạnh Quyết Nguyễn

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A method with @Bean autowires without @Autowired

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