SpringBoot内嵌tomcat，直接run Application即可，那么我们如何去除内嵌的tomcat，使用自己的呢？

一、POM(去除内嵌tomcat后，需要添加servlet依赖)

   <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-web</artifactId>
   <!-- 去除内嵌tomcat -->
   <exclusions>
    <exclusion>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-tomcat</artifactId>
    </exclusion>
   </exclusions>
  </dependency>
  <!--添加servlet的依赖-->
  <dependency>
   <groupId>javax.servlet</groupId>
   <artifactId>javax.servlet-api</artifactId>
   <version>3.1.0</version>
   <scope>provided</scope>
  </dependency>

   <plugin>
    <artifactId>maven-war-plugin</artifactId>
    <version>3.0.0</version>
   </plugin>

打包方式设置成war

<packaging>war</packaging>

二、继承SpringBootServletInitializer重写configure方法

package com.example.export;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;

@SpringBootApplication
public class ExportApplication extends SpringBootServletInitializer {
 public static void main(String[] args) {
 SpringApplication.run(ExportApplication.class, args);
 }

 @Override
 protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
 return builder.sources(this.getClass());
 }

}

三、添加到tomcat容器、run 即可