Spring Boot: Configuring a Main Class

Spring Boot 1.x

jar {
    baseName = 'interface'
    version = '0.0.1-SNAPSHOT'
    manifest {
        attributes 'Main-Class': 'net.pupli.sobhan.SobhanApplication'
    }
}

Spring Boot 2.x

springBoot {
    mainClassName = 'org.baeldung.DemoApplication'
}

or

bootJar {
    mainClassName = 'org.baeldung.DemoApplication'
}

bootJar {
    manifest {
    attributes 'Start-Class': 'org.baeldung.DemoApplication'
    }
}

References

https://www.baeldung.com/spring-boot-main-class