Spring Bean 的初始化过程.... 执行过程FileSystemXmlApplicationContext    ↓org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)刷新入口    ↓org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913)实例化所有的(non-lazy-init)单例     ↓org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585)Instantiate all remaining (non-lazy-init) singletons，进行遍历    ↓org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)调用获取动作doGetBean    ↓org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)获取共享实例sharedInstance    ↓org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)创建了一个内部的ObjectFactory，定义了一个内部getObject方法，然后    ↓org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)调用父类实现的createBean方法    ↓org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)判断一些条件后调用执行方法doCreateBean    ↓org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)大部分实例动作的包装类（包括485的createBeanInstance--构建实例、）    ↓org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1118)填充数据（下面就是判断、遍历填充数据）    ↓org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1360)    ↓org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:153)    ↓org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveManagedList(BeanDefinitionValueResolver.java:353)    ↓org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:194)AbstractAutowireCapableBeanFactory的：createBeanInstance方法最后面// Need to determine the constructor...Constructor[] ctors = determineConstructorsFromBeanPostProcessors(beanClass, beanName);if (ctors != null ||        mbd.getResolvedAutowireMode() == RootBeanDefinition.AUTOWIRE_CONSTRUCTOR ||        mbd.hasConstructorArgumentValues() || !ObjectUtils.isEmpty(args))  {    return autowireConstructor(beanName, mbd, ctors, args);}// No special handling: simply use no-arg constructor.return instantiateBean(beanName, mbd);