两种情况

第一种：

Caused by: java.lang.ClassNotFoundException: org.apache.catalina.filters.RemoteIpFilter

第二种：

Unable to start EmbeddedWebApplicationContext due to missing EmbeddedServletContainerFactory bean

 

解决：注释tomcat启动包的provided

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-tomcat</artifactId>
     <!--<scope>provided</scope>-->
</dependency>