sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath

一、报错信息

sun.security.validator.ValidatorException: PKIX path building failed: 
sun.security.provider.certpath.SunCertPathBuilderException: 
unable to find valid certification path to requested target
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由于JVM默认信任证书不包含该目标网站的SSL证书，导致无法建立有效的信任链接。所以我们将原先的google()和jcenter()仓库替换为国内的仓库。必须先确保你的Java环境是正确的，即环境变量是配置无误的。

二、解决方法

1、在build.gradle(Project)的buildscript闭包下替换为阿里云maven仓库：

2、在build.gradle(Project)的allprojects闭包下也替换为阿里云maven仓库：

3、然后重新Sync项目，开始下载依赖。

万能代码直接复制：

maven { url 'https://www.jitpack.io' }
maven { url 'https://maven.aliyun.com/repository/public' }
maven { url 'https://maven.aliyun.com/repository/central' }
maven { url 'https://maven.aliyun.com/repository/jcenter' }
maven { url 'https://maven.aliyun.com/repository/google' }
maven { url 'https://maven.aliyun.com/repository/gradle-plugin' }
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