一:引入maven依赖

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

  <packaging>war</packaging>

二:核心启动类加相关配置

package com.sx.file;

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 DockerwebApplication extends SpringBootServletInitializer {
    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
        return builder.sources(DockerwebApplication.class);
    }

    public static void main(String[] args) {
        SpringApplication.run(DockerwebApplication.class, args);
    }

}

一切欧克,将war包上传到服务器

打工告成!