How to autowire by name in Spring with annotations?

Question

I have several beans of the same class defined:

  @Bean   public FieldDescriptor fullSpotField() {      FieldDescriptor ans = new FieldDescriptor("full_spot", String.class);      return ans;   }    @Bean   public FieldDescriptor annotationIdField() {      FieldDescriptor ans = new FieldDescriptor("annotationID", Integer.class);      return ans;   } 

consequently when I autowire them

   @Autowired    public FieldDescriptor fullSpotField;     @Autowired    public FieldDescriptor annotationIdField; 

I get an exception

NoUniqueBeanDefinitionException: No qualifying bean of type [...FieldDescriptor] is defined: expected single matching bean but found ... 

How to autowire by name as it possible in XML config?

Answer 1

You can use @Qualifier to solve it.

In your case you can make:

 @Bean(name="fullSpot")  // Not mandatory. If not specified, it takes the method name i.e., "fullSpotField" as qualifier name.   public FieldDescriptor fullSpotField() {      FieldDescriptor ans = new FieldDescriptor("full_spot", String.class);      return ans;   }    @Bean("annotationIdSpot")   // Same as above comment.   public FieldDescriptor annotationIdField() {      FieldDescriptor ans = new FieldDescriptor("annotationID", Integer.class);      return ans;   } 

and subsequently you can inject using:

   @Autowired    @Qualifier("fullSpot")    public FieldDescriptor fullSpotField;     @Autowired    @Qualifier("annotationIdSpot")    public FieldDescriptor annotationIdField;