手动注入bean

https://github.com/liuyueyi/spring-boot-demo

https://my.oschina.net/u/566591/blog/2245517

https://my.oschina.net/u/2413863/blog/1540698

https://blog.csdn.net/geekjoker/article/details/80497913

https://blog.csdn.net/lichuangcsdn/article/details/89694363

https://blog.hhui.top/hexblog/2018/08/04/180804-Spring%E4%B9%8B%E5%8A%A8%E6%80%81%E6%B3%A8%E5%86%8Cbean/#1-%E4%B8%80%E7%81%B0%E7%81%B0Blog%EF%BC%9A-https-liuyueyi-github-io-hexblog