一、配置pom.xml

在<project>标签下加入

<packaging>war</packaging>

二、添加Tomcat模块

在<dependencies>下添加

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

三、配置启动类

@SpringBootApplication
public class InformApplication extends SpringBootServletInitializer {
    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
        return application.sources(InformApplication.class);
    }

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

}

完成这三部曲就可以直接打成war包发布了。