1. 修改 Spring Boot 的 Application 类，使其继承 SpringBootServletInitializer 类，并重写 configure 方法：

@SpringBootApplication
public class CmsApplication extends SpringBootServletInitializer {

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
        return builder.sources(CmsApplication.class);
    }

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

1. 修改项目构建配置文件：

Maven（pom.xml）：

<packaging>war</packaging>

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

Gradle（build.gradle）：

apply plugin: 'war'

dependencies {
    providedRuntime 'org.springframework.boot:spring-boot-starter-tomcat'
}

1. 执行打包命令：

Maven：

mvn clean package

Gradle：

gradle clean
gradle bootWar