1、倉庫配置
默認是到maven中央倉庫進行下載依賴，由於maven中央倉庫服務器在國外，速度可想而知。所以，國內開發者通常會設置優先從國內倉庫（如阿里雲）下載。
你可能認為，只要這樣：
- with groovy
repositories { //... maven { url "http://maven.aliyun.com/nexus/content/groups/public/" } //... } - with kotlin
repositories { //... maven { setUrl("http://maven.aliyun.com/nexus/content/groups/public/") } //... }
結果：
* What went wrong:
Could not resolve all dependencies for configuration ':detachedConfiguration13'.
Using insecure protocols with repositories, without explicit opt-in, is unsupported. Switch Maven repository 'maven(http://maven.aliyun.com/nexus/content/groups/public/)' 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.
what fk ? 沒辦法，看一下gradle的描述：doc
Specifies whether it is acceptable to communicate with a repository over an insecure HTTP connection.
For security purposes this intentionally requires a user to opt-in to using insecure protocols on case by case basis.
Gradle intentionally does not offer a global system/gradle property that allows a universal disable of this check.
大概意思就是：gradle為了安全考慮，防止他人冒充目標服務器，並在資源中植入惡意代碼...所以默認禁用使用非官方的中央倉庫（包括阿里雲），如果你確認信任該倉庫，需要你顯示聲明信任它。
所以你需要這樣配置：
- with groovy
repositories { //... maven { allowInsecureProtocol = true url "http://maven.aliyun.com/nexus/content/groups/public/" } //... } - with kotlin
repositories { //... maven { isAllowInsecureProtocol = true setUrl("http://maven.aliyun.com/nexus/content/groups/public/") } //... }