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                ??碼云GVP開源項目 12k star Uniapp+ElementUI 功能強大 支持多語言、二開方便! 廣告
                ApplicationContext是比工廠更高級的接口,能夠維護beans的注冊和依賴,使用方法`T getBean(String name, Class<T> requiredType)`可以獲取bean的實例。 ApplicationContext可以讀取bean的定義和訪問bean,比如: ~~~java // 創建配置的beans ApplicationContext context = new ClassPathXmlApplicationContext("services.xml", "daos.xml"); // 獲取配置的bean實例 PetStoreService service = context.getBean("petStore", PetStoreService.class); // 使用配置的實例 List<String> userList = service.getUsernameList(); ~~~ 你可以使用getBean獲取bean實例,ApplicationContext還提供了其他方法來獲取bean實例,但是,最好不要使用它們。事實上,連getBean都不應該使用。這樣會導致脫離了spring api。例如,spring與web框架集成提供依賴注入的web組件,如controllers和JSF-managed beans,允許你通過元數據(自動注解)聲明對特殊對象的依賴,沒有必要自行去獲取bean。
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