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My_Spring_Framework 模拟实现 Spring 框架机制

简介

本项目是一个模拟Spring框架核心功能的示例,包括IoC容器,自动装配,后置处理器,以及AOP代理。

核心机制

容器配置类 - HzxSpringConfig

定义配置类,用于声明组件扫描路径和其他配置。

容器 - HzxSpringApplicationContext

实现一个简单的IoC容器,负责初始化和管理Bean的生命周期。

组件扫描 - ComponentScan注解

自定义注解,指定待扫描的包路径,容器将自动注册该路径下的Bean。

Bean定义 - BeanDefinition

封装Bean对象信息,包括作用域和其他元数据。

Bean作用域 - @Component & @Scope注解

@Component标记一个类为Bean组件,@Scope指定Bean实例的作用域(单例或原型)。

自动装配 - @Autowired注解

自动注入依赖的Bean对象。

Bean后置处理器 - InitializingBean & BeanPostProcessor

模拟Spring的Bean后置处理器功能,允许在Bean初始化前后执行自定义操作。

AOP代理 - AOP通知信息类 & AopBeanPostProcessor

通过动态代理机制,为目标对象织入横切逻辑,如日志、事务等。

启动测试

通过启动测试类验证容器的初始化、Bean的获取和AOP代理的功能。

使用说明

配置容器

@ComponentScan("com.hzx.myspring.component")
public class HzxSpringConfig {
    // 配置信息...
}

启动容器

public class Application {
    public static void main(String[] args) {
        HzxSpringApplicationContext context = new HzxSpringApplicationContext(HzxSpringConfig.class);
        // 使用context...
    }
}

定义Bean

@Component("myBean")
@Scope("singleton")
public class MyBean {
    // Bean实现...
}

自动装配

public class MyService {
    @Autowired
    private MyBean myBean;
    // 使用myBean...
}

后置处理器使用

实现InitializingBean和BeanPostProcessor接口,自定义初始化逻辑。

AOP使用

通过AopBeanPostProcessor为Bean创建动态代理。

示例代码

请参考com.hzx.myspring.test包下的测试类进行实例化和使用

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