【替换Web容器】SpringBoot 替换默认的容器

        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
             #排除tomcat容器
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.bootgroupId>
                    <artifactId>spring-boot-starter-tomcatartifactId>
                exclusion>
            exclusions>
        dependency>
             #引入undertow容器
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-undertowartifactId>
        dependency>