One Spring Boot project, deploy to both JAR or WAR

Question

Is there a way to have a single Spring Boot project be packagable into both JAR and WAR without changing the pom.xml or the application source?

I've read Converting a Spring Boot JAR Application to a WAR, but it converts the project to WAR and it loses the ability to be packaged as JAR.

I don't expect mvn package to do both. What I want is something like mvn i-want-a-jar and it would package the project as JAR. Or I could run mvn i-want-a-war and it would package the project as WAR.

Is this possible?

Answer 1

I managed to do it by adding

<packaging>${packaging.type}</packaging> 

to the POM file and then setting different profiles for JAR and WAR:

  <profiles>     <profile>       <id>jar</id>       <properties>         <packaging.type>jar</packaging.type>       </properties>     </profile>     <profile>       <id>war</id>       <properties>         <packaging.type>war</packaging.type>       </properties>       <dependencies>         <dependency>           <groupId>org.springframework.boot</groupId>           <artifactId>spring-boot-starter-tomcat</artifactId>           <scope>provided</scope>         </dependency>       </dependencies>     </profile>   </profiles> 

Now mvn package -P war produces a WAR and mvn package -P jar produces a JAR.

Another option is to create separate modules for JAR and WAR, but I didn't go that route.