IntelliJ IDEA shows errors when using Spring's @Autowired annotation

Question

IntelliJ IDEA is showing errors when I use Spring\'s @Autowired annotation in the class, but the class is functioning without any problem.

Here is this

Answer 1

a little late but i hope it helps to someone else.

Make sure to put the @Service on the implementation class for the service

@Service
public class ServiceNameImpl implements ServiceName {

    @Override
    public void method(ObjectType paramName) {
        //CODE
    }

}

That's how i fixed the error.

Answer 2

If you know that the bean exists and its just a problem of the inspections, then just add the following before the variable declaration:

@SuppressWarnings("SpringJavaAutowiringInspection")
@Inject MyClass myVariable;

Sometimes IntelliJ cannot resolve if a bean has been declared, for example when the bean is included conditionally and the condition resolution happens at runtime.

Answer 3

File -> ProjectStructure -> Modules -> +(in central column) -> Spring ->OK

Answer 4

I solved that adding a Web facet.

Answer 5

I had this problem with only one service with constructor based dependency injection with 2019.2.4 version of IntelliJ. I found it helpful to change the name of the service (shift + f6) and then discard the changes from the git level.

Answer 6

The following worked for me:

1. Find all classes implementing the service(interface) which is giving the error.
2. Mark each of those classes with the @Service annotation, to indicate them as business logic classes.
3. Rebuild the project.