How to Load Beans A and B in Order in Spring

1. Use the @DependsOn Annotation

• TestController

@DependsOn("testService")
@Service
public class TestController
{
    @Autowired
    private TestService testService;
    public TestController()
    {
        System.out.println(this.getClass().getSimpleName() + " initializing...");
    }

    public void test()
    {
        String byId = testService.getById(1);
        System.out.println(byId);
    }
}

• TestService

@Service
public class TestService
{

    public TestService()
    {
        System.out.println(this.getClass().getSimpleName() + " initializing...");
    }

    public String getById(Integer id)
    {
        return "" + id;
    }
}

• Output during startup

TestService initializing...
TestController initializing...

2. References

• How to Control the Initialization Order of Two Beans in Spring? - Zhihu
• Using @DependsOn or depends-on Configuration - Juejin