内省和反射：https://www.cnblogs.com/winclpt/articles/7405271.html
深入理解web.xml中配置/和/*的区别 https://blog.csdn.net/z69183787/article/details/83580925
多线程使用AtomicReference https://www.jianshu.com/p/5521ae322743
信号量：https://blog.csdn.net/mryang125/article/details/81490783
Sentinel 实战-限流篇： https://www.jianshu.com/p/3b8d259666d9
熔断器Resilience4j：https://blog.csdn.net/qwe86314/article/details/98873884 和 https://www.jianshu.com/p/4271ebc40be8
redis使用：https://www.cnblogs.com/qdhxhz/category/1228421.html
