apollo-portal/src/main/java/com/ctrip/framework/apollo/openapi/v1/controller/ItemController.java/ItemController/ItemController
class ItemController:  public ItemController(final ItemService itemService, final UserService userService,
      ItemOpenApiService itemOpenApiService) {
    this.itemService = itemService;
    this.userService = userService;
    this.itemOpenApiService = itemOpenApiService;
  }