SpringBoot启动报错：
可能的问题是包冲突所造成的，你看你最近添加了什么包，可能跟springboot版本冲突，降低版本即可；
我遇到的问题是子工程bean的名字与父工程bean的命名重复所导致的。
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成功解决：java.lang.IllegalStateException: StandardEngine[Tomcat].StandardHost[localhost].TomcatEmbeddedContext[] failed to start
关于: java.lang.IllegalStateException: StandardEngine[Tomcat].StandardHost[localhost].TomcatEmbeddedContext[] failed to start
maven:Failed to start component [StandardEngine[Tomcat].StandardHost[localhost].TomcatEmbeddedContext[]]
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Failed to start component [StandardEngine[Tomcat].StandardHost[localhost]]
springboot项目报错: org.apache.catalina.LifecycleException: Failed to start component [NonLoginAuthenticator[StandardEngine[Tomcat].StandardHost[localhost].TomcatEmbeddedContext[]]]
Failed to start component [StandardEngine[Tomcat].StandardHost[localhost].StandardContex
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