tiny-IoC

步骤：

1.step1-最基本的容器

step-1-container-register-and-get

单纯的map，有get和put bean的功能

2.step2-将bean创建放入工厂

step-2-abstract-beanfactory-and-do-bean-initilizing-in-it

抽象beanfactory
将bean初始化放入beanfactory

3.step3-为bean注入属性

step-3-inject-bean-with-property

4.step4-读取xml配置来初始化bean

step-4-config-beanfactory-with-xml