1.Configuration：XML ,Annotation, Java-configuration

2.instantiating a container

ApplicationContext context = new ClassPathXmlApplicationContext("services.xml", "daos.xml");

or

ApplicationContext ctx = new AnnotationConfigApplicationContext("com.desmond.demo*");

3.Using the container

// create and configure beans
ApplicationContext context = new ClassPathXmlApplicationContext("services.xml", "daos.xml");

// retrieve configured instance
PetStoreService service = context.getBean("petStore", PetStoreService.class);

// use configured instance
List<String> userList = service.getUsernameList();