1.pom.xml

<!-- 改成war -->
<packaging>war</packaging>


         <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <!-- 移除嵌入式tomcat插件-->
             <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-tomcat</artifactId>
                </exclusion>
            </exclusions> 
        </dependency>
<!-- 导入servelt api -->
        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-servlet-api</artifactId>
            <version>8.5.9</version>
            <scope>provided</scope>
        </dependency> 

    <build>
        <finalName>invengoaccess</finalName>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

2.Application

import org.jboss.logging.Logger;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.support.SpringBootServletInitializer;



@SpringBootApplication
public class Application extends SpringBootServletInitializer {
  //public class Application{
    private static Logger logger = Logger.getLogger(Application.class);

    /**
     * Start
     */
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
        logger.info("SpringBoot Start Success");
    }
}

3.遇到的问题

java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.Lifec

原因是--- 有jar包冲突（这边是mybatis 冲突）

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
    
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-amqp</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
<!-- 这边有mybatis了  不需要再引入-->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.1</version>
        </dependency>
    
        <!--    
          问题在这
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.2.8</version>
        </dependency> -->