--- theme: Chinese-red --- ## 一、核心架构分析 ### 1. Spring AOP核心组件 ```mermaid classDiagram class AnnotationAwareAspectJAutoProxyCreator { + postProcessAfterInitialization() + getAdvicesAndAdvisorsForBean() } class ProxyFactory { + target : Object + advisors : List + getProxy() + getInterceptorsAndDynamicInterceptionAdvice() } class Advisor { <> + getAdvice() + isPerInstance() } class AspectJPointcutAdvisor { - advice : Advice - pointcut : Pointcut + matches() } class ReflectiveMethodInvocation { - interceptors : List - currentInterceptorIndex : int + proceed() } AnnotationAwareAspectJAutoProxyCreator --> ProxyFactory : 创建 ProxyFactory "1" --> "*" Advisor : 包含 Advisor "1" --> "1" Advice : 包含 ProxyFactory --> ReflectiveMethodInvocation : 创建 ReflectiveMethodInvocation --> Advice : 执行 ``` ## 二、底层运作机制详解 ### 1. 代理创建流程 **AnnotationAwareAspectJAutoProxyCreator处理流程**: ```java public Object postProcessAfterInitialization(Object bean, String beanName) { // 步骤1: 检查是否需要创建代理 if (!shouldSkip(bean.getClass(), beanName)) { // 步骤2: 筛选匹配的Advisor Object[] specificInterceptors = getAdvicesAndAdvisorsForBean(bean.getClass()); // 步骤3: 创建代理 Object proxy = createProxy(bean.getClass(), beanName, specificInterceptors, bean); return proxy; } return bean; } protected Object createProxy(Class beanClass, String beanName, Object[] specificInterceptors, Object target) { // 步骤4: 构建ProxyFactory ProxyFactory proxyFactory = new ProxyFactory(); // 步骤5: 添加Advisor到ProxyFactory Advisor[] advisors = buildAdvisors(beanName, specificInterceptors); proxyFactory.addAdvisors(advisors); // 步骤6: 设置代理目标 proxyFactory.setTarget(target); // 步骤7: 创建代理对象 return proxyFactory.getProxy(); } ``` ### 2. 拦截器链构建原理 **ProxyFactory内部机制**: ```java public List