我是这样解决的:

val sourcesJar by tasks.creating(Jar::class) {
    dependsOn(JavaPlugin.CLASSES_TASK_NAME)
    classifier = "sources"
    from(sourceSets["main"].allSource)
}

publishing {
    publications {
        create<MavenPublication>("mavenJava") {
            groupId = "ua.tiras"
            artifactId = "aloader-core"
            version = "0.0.4"

            artifact(sourcesJar)
            artifact("$buildDir/libs/${project.name}.jar")

            pom {
                withXml {
                    asNode().appendNode("dependencies").let {
                        for (dependency in configurations["api"].dependencies) {
                            it.appendNode("dependency").apply {
                                appendNode("groupId", dependency.group)
                                appendNode("artifactId", dependency.name)
                                appendNode("version", dependency.version)
                            }
                        }
                    }
                }
            }
        }
    }
}

artifactory {
    setContextUrl("http://dev.tirascloud.com:8081/artifactory")
    publish(delegateClosureOf<PublisherConfig> {
        repository(delegateClosureOf<GroovyObject> {
            setProperty("repoKey", "gradle-dev-local")
            setProperty("username", project.findProperty("artifactory_username") ?: "nouser")
            setProperty("password", project.findProperty("artifactory_password") ?: "nopass")
        })
        defaults(delegateClosureOf<GroovyObject> {
            invokeMethod("publications", "mavenJava")
            setProperty("publishPom", true)
            setProperty("publishArtifacts", true)
        })
    })
    resolve(delegateClosureOf<ResolverConfig> {
        setProperty("repoKey", "repo")
    })