@Autowired by constructor looks for beans by type. How to inject a bean by name to a constructor using autowired annotation

Question

@Autowired by constructor looks for beans by type. How to inject a bean by name to a constructor using autowired annotation? I have 2 beans of same type but I need to inject it to constructor of another same class based on the bean name. How do I do it?

XML:

 <bean id="A" class="com.Check"/>  <bean id="B" class="com.Check"/> 

Java:

Class C {     private Check check;     @Autowired    public C(Check check){        this.check = check    }    } 

When I do this I get an exception telling me that I have 2 beans of same type check but it requires there to be just one bean of that type. How can I inject the bean with id="B" into this class C through constructor injection?

In my applicationContext.xml I have mentioned autowire="byType". I need to autowire byName only in this particular class rest all it needs to be autowired by Type only

Answer 1

You should use @Qualifier annotation with your target bean id for constructor parameter.

<bean id="A" class="com.Check"/> <bean id="B" class="com.Check"/>  Class C {     private Check check;     @Autowired    public C(@Qualifier("A") Check check){ //<-- here you should provide your target bean id       this.check = check    } }