spring boot web.xml listener

Spring Boot 2.X(十)：自定义注册 Servlet、Filter、Listener - 云+社区 - 腾讯云
https://cloud.tencent.com/developer/article/1527048

Spring Boot （Web 篇）：整合监听器Listener_Soinice的博客-CSDN博客
https://blog.csdn.net/Soinice/article/details/82869919