Three ways of Spring beans dependency injection

[genkio]

Property based injection

@RestController
public class PageController {
  @Autowired
  private NotificationService notificationService;
}

Setter based injection

@RestController
public class PageController {
  private NotificationService notificationService;

  @Autowired
  public void setNotificationService(NotificationService notificationService) {
    this.notificationService = notificationService;
  }
}

Constructor based injection

public class PageController {
  private NotificationService notificationService;

  @Autowired
  public PageController(NotificationService notificationService) {
    this.notificationService = notificationService;
  }
}

[ghost]

顶，才看到