@Bean通过实例工厂实例化Bean具体代码

回答: @Bean通过实例工厂实例化Bean的具体代码如下所示:

@Configuration
public class AppConfig {
    @Bean
    public MyBean myBean() {
        return new MyBeanFactory().createMyBean();
    }
}

public class MyBeanFactory {
    public MyBean createMyBean() {
        return new MyBean();
    }
}

public class MyBean {
    public MyBean() {
        System.out.println("MyBean Initializing");
    }
}

在上述代码中，通过创建一个名为MyBeanFactory的实例工厂类，在工厂类中定义了createMyBean()方法用于实例化MyBean对象。在AppConfig配置类中，通过@Bean注解将myBean()方法标记为需要交由Spring进行管理的bean。当通过ApplicationContext获取bean时，Spring会调用MyBeanFactory的createMyBean()方法实例化MyBean对象，并将其纳入IOC容器中供其他组件使用。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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