启动springboot，报错
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APPLICATION FAILED TO START
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Description:
An attempt was made to call a method that does not exist. The attempt was made from the following location:
org.apache.catalina.authenticator.AuthenticatorBase.startInternal(AuthenticatorBase.java:1321)
The following method did not exist:
javax.servlet.ServletContext.getVirtualServerName()Ljava/lang/String;
The method's class, javax.servlet.ServletContext, is available from the following locations:
jar:file:/cloud-0.0.1-SNAPSHOT.jar!/BOOT-INF/lib/servlet-api-2.5.jar!/javax/servlet/ServletContext.class
jar:file:/cloud-0.0.1-SNAPSHOT.jar!/BOOT-INF/lib/tomcat-embed-core-9.0.37.jar!/javax/servlet/ServletContext.class
The class hierarchy was loaded from the following locations:
javax.servlet.ServletContext: jar:file:/cloud-0.0.1-SNAPSHOT.jar!/BOOT-INF/lib/servlet-api-2.5.jar!/
Action:
Correct the classpath of your application so that it contains a single, compatible version of javax.servlet.ServletContext
解决：
去pom文件夹找重复的包 删掉一个重复的就行了 报错中已经把重复的包指出来了
https://blog.csdn.net/m0_37783096/article/details/90767755
https://blog.csdn.net/baidu_41678737/article/details/89455858