Execution failed for task ':demo01:publishMavenPublicationToMaven3Repository'.
> Failed to publish publication 'maven' to repository 'maven3'
   > Using insecure protocols with repositories, without explicit opt-in, is unsupported. Switch Maven repository 'maven3(http://localhost:8082/repository/repos0/)' to redirect to a secure protocol (like HTTPS) or allow insecure protocols. See https://docs.gradle.org/7.0.2/dsl/org.gradle.api.artifacts.repositories.UrlArtifactRepository.html#org.gradle.api.artifacts.repositories.UrlArtifactRepository:allowInsecureProtocol for more details. 

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使用gradle上传本地aar到本地maven私用服务器时报了上面的错误信息；

因为用了http而不是https导致的，http明文传输不安全，因为是自己用nexus搭建的demo maven环境，所以没有去折腾https，直接用了其自带的jett web容器；解决办法是

allowInsecureProtocol = true

具体代码如下：

         // 仓库
         maven {
             allowInsecureProtocol = true

             // 凭证
             credentials {
                 username 'abcdefg' // 仓库发布用户名
                 password 'passw' // 仓库发布用户密码
             }
             // 地址
             url 'http://localhost:8082/repository/repos0/'
         }