1、根據類獲取物件

@Autowired

 ApplicationContext context;

GenericMapper<T,String> dao=(GenericMapper<T,String>)context.getBean(TestDaoImpl.class);

2、根據介面獲取實現類的物件

@Autowired

ApplicationContext context;

GenericMapper<T,String> dao=(GenericMapper<T,String>)context.getBean(TestInterface.class);