Spring-IOC學習

Spring Bean 的初始化過程.... 

執行過程
FileSystemXmlApplicationContext
    ↓
org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)
刷新入口
    ↓
org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913)
實例化全部的(non-lazy-init)單例 
    ↓
org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585)
Instantiate all remaining (non-lazy-init) singletons，進行遍歷
    ↓
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
調用獲取動做doGetBean
    ↓
org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
獲取共享實例sharedInstance
    ↓
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
建立了一個內部的ObjectFactory，定義了一個內部getObject方法，而後
    ↓
org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
調用父類實現的createBean方法
    ↓
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
判斷一些條件後調用執行方法doCreateBean
    ↓
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
大部分實例動做的包裝類（包括485的createBeanInstance--構建實例、）
    ↓
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1118)
填充數據（下面就是判斷、遍歷填充數據）
    ↓
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
方法最後面
// 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);