spring第一阶段学习总结

代码：

    ClassPathResource resource =new ClassPathResource("bean.xml");

    DefaultListableBeanFactory factory =new DefaultListableBeanFactory();

    XmlBeanDefinitionReader reader =new XmlBeanDefinitionReader(factory);

    reader.loadBeanDefinitions(resource);

spring解析资源得到resourced对象，根据resource对象解析成document对象，根据document对象解析得到beanDefinition，并注册到 DefaultListableBeanFactory中即this.beanDefinitionMap.put(beanName, beanDefinition);