預設打JAR包，如果要打WAR包，按以下步驟：

1. 改寫Application入口類

@SpringBootApplication
public class Application extends SpringBootServletInitializer {

	@Override
	protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
		return application.sources(Application.class);
	}

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

}

2. 在pom.xml改變此專案的打包方式

<packaging>war</packaging>

3. 在pom.xml中表明tomcat已提供，不需要內建的tomcat

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

mvn clean package

將WAR放入TOMCAT安裝目錄的webapps, 啟動TOMCAT，訪問該web專案

http://localhost:8080/web專案