mini-Spring-一个简单的bean容器(一)

bean容器放在bean工厂中 bean工厂中有一个HashMap（bean的名称 和 bean本身来存放bean）bean是Object类型的

public class BeanFactory {
	private Map<String, Object> beanMap = new HashMap<>();

	public void registerBean(String name, Object bean) {
		beanMap.put(name, bean);
	}

	public Object getBean(String name) {
		return beanMap.get(name);
	}
}

对上述代码进行测试 HelloService是一个bean

@Test
	public void testGetBean() throws Exception {
		BeanFactory beanFactory = new BeanFactory();
		beanFactory.registerBean("helloService", new HelloService());
		HelloService helloService = (HelloService) beanFactory.getBean("helloService");
		assertThat(helloService).isNotNull();
		assertThat(helloService.sayHello()).isEqualTo("hello");
	}

	class HelloService {
		public String sayHello() {
			System.out.println("hello");
			return "hello";
		}
	}