Answer by Norberto Ritzmann for SpringBoot application doesn't autowire field

The below implementation works well for me. You have two issues, first you have to choose between @Service and @Bean and the other issue I've seen in your code was the @Value annotation, you have to use only to inject a value from the properties.

@SpringBootApplication
public class TestedValueApplication {

    @Autowired
    void printServiceInstance(ServiceA service) {

        System.out.println("Service instance: " + service);
        System.out.println("value==value? " + service.isFieldA("value"));
    }

    public static void main(String[] args) {
        SpringApplication.run(TestedValueApplication.class, args);

    }

    @Bean
    public ServiceA serviceA(@Value("${fieldA}") String fieldA) {
        return new ServiceAImpl(fieldA);
    }
}

Service:

public class ServiceAImpl implements ServiceA {

    private String fieldA;

    ServiceAImpl(String fieldA) {
        this.fieldA = fieldA;
    }

    public boolean isFieldA(String text) {
        return fieldA.equals(text);
    }
}

application.properties:

fieldA=value