spring自动装配注入不了

[Study_of_java]

spring的配置文件：

<bean id="itemsService" class="ssm.check.service.impl.ItemsServiceImpl" >
	</bean>

controller的定义：

@Controller
public class ItemsController {
	@Autowired
	private ItemsService itemsService;
	
	@RequestMapping("/findItemsByName")
	public ModelAndView findItemsByName() {

		List<ItemsCustom> itemsList = itemsService.findItemsByName(null);
		
		ModelAndView modelAndView = new ModelAndView();

		modelAndView.addObject("itemsList", itemsList);
		// 视图
		modelAndView.setViewName("WEB-INF/jsp/items/itemsList.jsp");

		return modelAndView;
	}

异常：

Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private ssm.check.mapper.ItemsCustomMapper ssm.check.service.impl.ItemsServiceImpl.itemsCustomMapper; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [ssm.check.mapper.ItemsCustomMapper] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}