Caused by: java.lang.NoClassDefFoundError: ServletContextEvent

回答: 根据引用\[1\]的错误信息，Caused by: java.lang.NoClassDefFoundError: ServletContextEvent，这个错误通常是由于缺少javax.servlet.ServletContextEvent类引起的。根据引用\[2\]中的代码片段，可以看出在springboot内置的tomcat中，如果没有将javax.servlet相关的包打包至classpath中，就会出现这个错误。因此，解决这个问题的方法是将javax.servlet相关的包添加到项目的依赖中，确保这些包能够被正确加载。
#### 引用[.reference_title]
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- *2* [Caused by: java.lang.NoClassDefFoundError: javax/servlet/ServletContext](https://blog.csdn.net/weixin_30544657/article/details/101087200)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insert_down28v1,239^v3^insert_chatgpt"}} ] [.reference_item]
- *3* [如果遇到java.lang.NoClassDefFoundError: javax/servlet/ServletContext问题具体代码和解决方案如下面所示](https://blog.csdn.net/weixin_30792221/article/details/115070157)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insert_down28v1,239^v3^insert_chatgpt"}} ] [.reference_item]
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