方法內(nèi)容：

protected ConfigurableListableBeanFactory obtainFreshBeanFactory() {
        refreshBeanFactory();
        ConfigurableListableBeanFactory beanFactory = getBeanFactory();
        if (logger.isDebugEnabled()) {
            logger.debug("Bean factory for " + getDisplayName() + ": " + beanFactory);
        }
        return beanFactory;
    }

實現(xiàn)一：org.springframework.context.support.AbstractRefreshableApplicationContext.class

refreshBeanFactor()代碼

@Override
    protected final void refreshBeanFactory() throws BeansException {
        //如果有beanFactory先銷毀
        if (hasBeanFactory()) {
            destroyBeans();
            closeBeanFactory();
        }
        try {
            DefaultListableBeanFactory beanFactory = createBeanFactory();//創(chuàng)建新工廠
            beanFactory.setSerializationId(getId());//設置serializationId
            customizeBeanFactory(beanFactory);//設置beanFactory
            loadBeanDefinitions(beanFactory);//加載BeanDefinitions
            synchronized (this.beanFactoryMonitor) {
                this.beanFactory = beanFactory;
            }
        }
        catch (IOException ex) {
            throw new ApplicationContextException("I/O error parsing bean definition source for " + getDisplayName(), ex);
        }
    }

1、先銷毀原有beanFactory;
2命咐、創(chuàng)建并初始化BeanFactory；
3、加載BeanDefinitions至朗。

實現(xiàn)二：org.springframework.context.support.GenericApplicationContext.class

refreshBeanFactor()代碼

@Override
    protected final void refreshBeanFactory() throws IllegalStateException {
        if (!this.refreshed.compareAndSet(false, true)) {
            throw new IllegalStateException(
                    "GenericApplicationContext does not support multiple refresh attempts: just call 'refresh' once");
        }
        this.beanFactory.setSerializationId(getId());
    }

僅設置beanFactory的serializationId；

那么，這個beanFactory是在什么時候?qū)嵗拇煞縝eanDefinitions是在什么地方加載的仰税？

beanFactory實例化：
beanFactory是在GenericApplicationContext的默認構造函數(shù)里實例化的（DefaultListableBeanFactory）

加載beanDefinitions：
GenericApplicationContext的子類在構造函數(shù)里加載beanDefinitions