6.3、核心容器支持函数式风格 GenericApplicationContext

//函数式风格创建对象，交给 spring 进行管理
@Test
public void testGenericApplicationContext() {
     //1 创建 GenericApplicationContext 对象
     GenericApplicationContext context = new GenericApplicationContext();
    //2 调用 context 的方法对象注册
     context.refresh();
     context.registerBean("user1",User.class,() -> new User());
    //3 获取在 spring 注册的对象
     // User user = (User)context.getBean("com.atguigu.spring5.test.User");
     User user = (User)context.getBean("user1");
     System.out.println(user);
}