【Spring源码解析】组件注册-FactoryBean注册组件

实现

1. 配置

public class PersonFactoryBean implements FactoryBean {
    @Override
    public Object getObject() throws Exception {
        return new Person("刘德华", 55);
    }

    @Override
    public Class<?> getObjectType() {
        return Person.class;
    }

    @Override
    public boolean isSingleton() {
        return true;
    }
}

2. 注册

@Configuration
public class BeanConfig2 {

    @Bean
    public PersonFactoryBean personFactoryBean() {
        return new PersonFactoryBean();
    }
}

3. 测试

/**
 * bean的类型:class cn.idea360.bean.Person
 * 工厂bean:class cn.idea360.bean.PersonFactoryBean
 */
@Test
public void test05() {
    AnnotationConfigApplicationContext applicationContext = new AnnotationConfigApplicationContext(BeanConfig2.class);

    Object personFactoryBean = applicationContext.getBean("personFactoryBean");
    System.out.println("bean的类型:" + personFactoryBean.getClass());

    Object bean = applicationContext.getBean("&personFactoryBean");
    System.out.println("工厂bean:" + bean.getClass());
}

最后

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