@Qualifier

---

Artifact

• spring-beans

역할

• @Autowired로 연결한 bean 목록에서 유일한 bean을 구별

memo

Spring은 동일한 타입을 가진 bean 객체가 2개 존재할 경우 어떤 bean을 주입할지 알 수 없기때문에 Exception을 발생시킴

사용법

bean 선언

@Bean 
@Qualifier("myWebClient") 
public class myWebClient implements WebClient {
	...
}

Constructor Injection

public class MyClass {
	private final WebClient webClient;
	
	@Autowired 
	public MyClass(@Qualifier("myWebClient") WebClient webClient) {
		this.webClient = webClient;
	}
}

Setter Injection

public class MyClass {
	private final WebClient webClient;
	
	@Autowired 
	public setWebClass(@Qualifier("myWebClient") WebClient webClient) {
		this.webClient = webClient;
	}
}

Field Injection

public class MyClass {
	@Autowired
	@Qualifier("myWebClient")
	private WebClient webClient;
}

---

연결문서

• @Autowired