001 IOC基础注解 @Configuration @Bean

public class Person {
    
    private String name;
    
    private Integer age;
// .......
}

//标记了@Configuration的类相当于一个配置类
@Configuration
public class Config {
    
    //标记了@Bean的方法(只有在配置类中才有效)
    //标记的方法中的返回值对象将被加入到IOC容器中
    @Bean
    public Person person() {
        return new Person("trek",11);
    }
}

public class MainTest {
    private ApplicationContext application = new AnnotationConfigApplicationContext(Config.class);
    
    @Test
    public void test1() {
        System.out.println(application.getBean("person"));
    }
}