Autowiring spring bean by name using annotation

Question

In the latest version of Springs we can autowire bean use annotation as @Autowired . It will be an autwire bean using its type (or constructor, if applicable on it). Is there a way to use the @Autowired annotation based on the bean name that we did without annotation in the Spring XML file as autowire = "byName" ?

Answer 1

You can use the JSR-250 @Resource for auto-bean if you do not need to inject a constructor or insert a few parameters.

From the docs:

If you intend to express the injection introduced by the annotation by name, do not use @Autowired basically, even if it is technically possible to refer to the bean name via @Qualifier values. Instead, use the JSR-250 @Resource annotation, which is semantically defined to identify a specific target component by its unique name, and the declared type is not relevant to the matching process.

Answer 2

You can use:

 @Autowired @Qualifier("beanname") 

According to @Qualifier javadoc

This annotation can be used in a field or parameter as a qualifier for fan-candidates for automatic training.

Answer 3

I used a bean proxy that messed up autowiring by name. @Resource did not have this problem, since it does not care about type. So now I know one reason for this recommendation by the Spring developers :-) Just FYI

Answer 4

If you want to determine the name of the bean with which they will be registered in the DI container, you can pass the name in the annotation itself, for example. @Service ("employeeManager").

Then, using the code below, you can enable autwire by name

 @Autowired @Qualifier("employeeManager") private EmployeeManagerService employeeManagerService; 

Answer 5

Use @Component ("beanname") in your bean's java class definition

Then, when autoinstallation uses JSR 330

@Inject @Named (Value = "beanname")