What is the right way to use an injected bean in a static method?

Question

This question might seem a little odd. Suppose I have a Service which I want to use in a Utility class that has some static methods. The Service is a Spring bean, so naturally I

Answer 1

You have no choice. If you want to initialize a static field of a class, you will have to let Spring create an instance of that class and inject the value.

A little advice. There really isn't any reason for you to be using static methods in this case. If you want a singleton utility, just make your bean have singleton scope.

Answer 2

You can't autowire static field.

But you can make a little workaround:

@Component
public class JustAClass{
  private static Service service;

  @Autowired
  private Service tmpService;

  @PostConstruct
  public void init() {
    service = tmpService;
  }

}

Note, that you have to declare this class as "Component" to inject tmpService