EhCache与Spring没有缓存

Question

我有使用Spring框架创建的项目.现在考虑为app缓存一些数据.我将EhCache库用于缓存.这个链接如何在spring上配置它:Spring Caching和Ehcache示例 它可以工作,但是当我要更改这行代码时

 ApplicationContext context = new AnnotationConfigApplicationContext(AppConfig.class);
 MovieDao obj = (MovieDao) context.getBean("movieDao");

至

  MovieDao obj = new MovieDaoImp();

它正在停止工作.它每次调用方法.但我想使用第二个.有什么区别？我怎么能让第二个工作？

添加了一些代码 我的spring MVC项目结构如下:

控制器:

@Controller 
public class MainController {

@Autowired
private BackEndService backEnd;

@RequestMapping(value = "/home", method = RequestMethod.GET)
  public ModelAndView viewDefault(Model model) throws Exception {
     model.addAttribute("categories", getCategoriesForGuest())
     return new ModelAndView(JspView.Home, model.asMap());
  }

 //@Cacheable(value = "categoriesCache")
 //first i want to make cachable this method. Not worked
 private List<Category> getCategoriesForGuest() {
    //i am going to cache method(guestListPaymentCategories()), but not worked neither.
    List<Category> categoriesResult = backEnd
   .guestListPaymentCategories()
   .getCategories()
   .getCategory();

   return categoriesResult;
}

}

BackEndService.java

@Service
public class BackEndService {
  protected WcfBackendService_Service service;
  protected WcfBackendService port;

  public BackEndService () {
        service = new WcfBackendService_Service();
        port = service.getSOAP();
  }

@Cacheable(value = "categoriesCache")
public ListCategoriesResult guestListPaymentCategories() {
    ListCategoriesResult result = null;
    try {
        result = port.guestListPaymentCategories(request);
        if (result.getResultCodes() == ResultCodes.OK) {
            return result;
        } else {
            throw new Exception(result.getDescription());
        }
    } catch (Exception ex) {
        log.error(ex.getMessage(), ex);
    }

    return result;
}

}

如果任何使用Spring> 4.1的工作样品将被碾压

Answer 1

当你使用对象创建对象时new ...(),它不再是Spring托管bean - 因此你会失去Spring添加的所有功能,即方面(在你的情况下) - @Cacheable,事务等.

基本上,Spring所做的是为对象创建一个代理,它处理对接口方法的所有调用,根据注释和方面添加额外的逻辑.手动创建对象实例时,不会创建任何代理,并且所有调用都直接进入对象的方法.