上传 jar 包到 Nexus 私服最简单的莫过于在网页上传，只需要手动选择需要上传的文件即可。在这里介绍下利用gradle上传jar包。上传Maven仓库主要可以使用maven-publish和maven插件，例子如下。

使用maven-publish插件

1. 添加插件
apply plugin: 'maven-publish'

2. 打包jar

task buildJar(dependsOn: ['assembleRelease'], type: Jar) {
    //后缀名
    extension = "jar"
    //最终的 Jar 包名
    archiveName = "${project.getName()}-release.jar"
    //需打包的资源所在的路径集
    def srcClassDir = [project.buildDir.absolutePath + "/intermediates/classes/release"]
    def srcKotlinClassDir = [project.buildDir.absolutePath + "/tmp/kotlin-classes/release"]
    //初始化资源路径集
    from srcClassDir
    from srcKotlinClassDir
    //去掉不要的类
    exclude('io/reactivex/android/R.class')
    //需要打包的类
    include('com/smartahc/android/smartble/*.class')
    include('com/smartahc/android/smartble/**/*.class')
}

3. 配置Maven仓库信息

publishing {
    publications {
        mavenJava(MavenPublication) {
            groupId GROUP_ID
            version = VERSION_NAME
            artifactId ARTIFACT_ID
            // Tell maven to prepare the generated "*.jar" file for publishing
            def artifactPath = "$buildDir/libs/${project.getName()}-release.jar"
            println(artifactPath)
            artifact(artifactPath)
        }
    }
    repositories {
        maven {
            // 指定要上传的maven私服仓库
            url = MAVEN_LOCAL_PATH
            //认证用户和密码
            credentials {
                username localRespos.userName
                password localRespos.password
            }
        }
    }
}

使用maven插件

1. 添加插件
apply plugin: 'maven'

2. 配置仓库信息

afterEvaluate { project ->
    uploadArchives {
        repositories.mavenDeployer {
            pom.groupId = localRespos.GROUP_ID
            pom.artifactId = localRespos.POM_ARTIFACT_ID
            pom.version = localRespos.VERSION_NAME
            repository(url: getRepositoryUrl()) {
                authentication(userName: localRespos.NEXUS_USERNAME, password: localRespos.NEXUS_PASSWORD)
            }
        }
    }
    task buildJar(dependsOn: ['assembleRelease'], type: Jar) {
        extension = "jar" //后缀名
        //最终的 Jar 包名
        archiveName = "${project.getName()}-release.jar"
        //需打包的资源所在的路径集
        def srcClassDir = [project.buildDir.absolutePath + "/intermediates/classes/release"]
        def srcKotlinClassDir = [project.buildDir.absolutePath + "/tmp/kotlin-classes/release"]
        //初始化资源路径集
        from srcClassDir
        from srcKotlinClassDir
        //去掉不要的类
        exclude('io/reactivex/android/R.class')
        //需要打包的类
        include('com/smartahc/android/smartble/*.class')
        include('com/smartahc/android/smartble/**/*.class')
    }
    artifacts {
        archives buildJar
    }
}