idea切换项目：
https://jingyan.baidu.com/article/624e7459008f4234e8ba5a97.html
Spring Boot2.0以上版本EmbeddedServletContainerCustomizer被WebServerFactoryCustomizer替代
在Spring Boot2.0以上配置嵌入式Servlet容器时EmbeddedServletContainerCustomizer类不存在，经网络查询发现被WebServerFactoryCustomizer替代
https://blog.csdn.net/Hard__ball/article/details/81281898?utm_source=blogxgwz4
注册三大组件之listener方法：
@Bean public ServletListenerRegistrationBean<Mylistener> mylistener(){ ServletListenerRegistrationBean<Mylistener> servletListenerRegistrationBean=new ServletListenerRegistrationBean<>(); servletListenerRegistrationBean.setListener(new Mylistener()); return servletListenerRegistrationBean; }
idea快捷键
https://jingyan.baidu.com/article/ed15cb1b86dab21be3698184.html