org.springframework.boot.context.event.ApplicationReadyEvent cannot be cast to org.springframework.boot.web.context.WebServerInitializedEvent
这个异常很明显。ApplicationReadyEvent 不能被强制转换为 WebServerInitializedEvent
至于怎么导致这个异常的，因为你给的信息太少。不知道。
完整报错如下，帮忙看下，非常感谢
java.lang.ClassCastException: org.springframework.boot.context.event.ApplicationReadyEvent cannot be cast to org.springframework.boot.web.context.WebServerInitializedEvent
at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:167) [spring-context-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139) [spring-context-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:399) [spring-context-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:353) [spring-context-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.boot.context.event.EventPublishingRunListener.finished(EventPublishingRunListener.java:100) [spring-boot-2.0.0.M3.jar:2.0.0.M3]
at org.springframework.boot.SpringApplicationRunListeners.callFinishedListener(SpringApplicationRunListeners.java:79) [spring-boot-2.0.0.M3.jar:2.0.0.M3]
at org.springframework.boot.SpringApplicationRunListeners.finished(SpringApplicationRunListeners.java:72) [spring-boot-2.0.0.M3.jar:2.0.0.M3]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:329) [spring-boot-2.0.0.M3.jar:2.0.0.M3]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1245) [spring-boot-2.0.0.M3.jar:2.0.0.M3]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1233) [spring-boot-2.0.0.M3.jar:2.0.0.M3]
at com.tiameas.cloud.Application.main(Application.java:30) [classes/:?]
关键代码不贴，没人给你解决
问了别人，好像是框架里类加载器的原因，不影响使用
那你就先用着吧