spring ioc
https://www.cnblogs.com/wmyskxz/p/8824597.html
spring aop
https://www.cnblogs.com/wmyskxz/p/8835243.html
spring mvc
https://www.cnblogs.com/wmyskxz/p/8848461.html
ssm maven
https://www.cnblogs.com/wmyskxz/p/8916365.html