跟代码
类 AbstractAutoProxyCreator
protected Object createProxy(Class<?> beanClass, @Nullable String beanName,//封装的被代理对象@Nullable Object[] specificInterceptors, TargetSource targetSource) {if (this.beanFactory instanceof ConfigurableListableBeanFactory) {AutoProxyUtils.exposeTargetClass((ConfigurableListableBeanFactory) this.beanFactory, beanName, beanClass);}//创建代理工厂ProxyFactory proxyFactory = new ProxyFactory();proxyFactory.copyFrom(this);/*** isProxyTargetClass()** true* 1、目标对象实现了接口 – 使用CGLIB代理机制* 2、目标对象没有接口(只有实现类) – 使用CGLIB代理机制** false* 1、目标对象实现了接口 – 使用JDK代理机制(代理所有实现了的接口)* 2、目标对象没有接口(只有实现类) – 使用CGLIB代理机制**默认false*/if (!proxyFactory.isProxyTargetClass()) {if (shouldProxyTargetClass(beanClass, beanName)) {//proxyTargetClass 是否对类进行代理，而不是对接口进行代理，设置为true时，使用CGLib代理。proxyFactory.setProxyTargetClass(true);}else {evaluateProxyInterfaces(beanClass, proxyFactory);}}//把advice类型的增强包装成advisor切面 见下3.2.1Advisor[] advisors = buildAdvisors(beanName, specificInterceptors);proxyFactory.addAdvisors(advisors);proxyFactory.setTargetSource(targetSource);customizeProxyFactory(proxyFactory);////用来控制代理工厂被配置后，是否还允许修改代理的配置,默认为falseproxyFactory.setFrozen(this.freezeProxy);if (advisorsPreFiltered()) {proxyFactory.setPreFiltered(true);}//获取代理实例 见3.2.2return proxyFactory.getProxy(getProxyClassLoader());
}
3.2.1 buildAdvisors
protected Advisor[] buildAdvisors(@Nullable String beanName, @Nullable Object[] specificInterceptors) {// Handle prototypes correctly...//自定义MethodInterceptor.拿到AnnotationAwareAspectJAutoProxyCreator对象调用setInterceptorNames方法Advisor[] commonInterceptors = resolveInterceptorNames();List<Object> allInterceptors = new ArrayList<>();if (specificInterceptors != null) {allInterceptors.addAll(Arrays.asList(specificInterceptors));if (commonInterceptors.length > 0) {if (this.applyCommonInterceptorsFirst) {allInterceptors.addAll(0, Arrays.asList(commonInterceptors));}else {allInterceptors.addAll(Arrays.asList(commonInterceptors));}}}if (logger.isTraceEnabled()) {int nrOfCommonInterceptors = commonInterceptors.length;int nrOfSpecificInterceptors = (specificInterceptors != null ? specificInterceptors.length : 0);logger.trace("Creating implicit proxy for bean '" + beanName + "' with " + nrOfCommonInterceptors +" common interceptors and " + nrOfSpecificInterceptors + " specific interceptors");}Advisor[] advisors = new Advisor[allInterceptors.size()];for (int i = 0; i < allInterceptors.size(); i++) {//对自定义的advice要进行包装，把advice包装成advisor对象，切面对象advisors[i] = this.advisorAdapterRegistry.wrap(allInterceptors.get(i));}return advisors;
}
3.2.2 getProxy
类 proxyFactory
public Object getProxy(@Nullable ClassLoader classLoader) {//根据目标对象是否有接口来判断采用什么代理方式，cglib代理还是jdk动态代理return createAopProxy().getProxy(classLoader);
}
跟 getProxy：
类 AopProxy
选 JDKDynamicAopProxy
@Override
public Object getProxy(@Nullable ClassLoader classLoader) {if (logger.isTraceEnabled()) {logger.trace("Creating JDK dynamic proxy: " + this.advised.getTargetSource());}//advised是代理工厂对象Class<?>[] proxiedInterfaces = AopProxyUtils.completeProxiedInterfaces(this.advised, true);findDefinedEqualsAndHashCodeMethods(proxiedInterfaces);//熟悉的方法return Proxy.newProxyInstance(classLoader, proxiedInterfaces, this);
}