彻底解决unable to find valid certification path to requested target

转载：

https://www.cnblogs.com/AndersonX/p/8707451.html

1  首先打开 Android Studio->File->Settings->然后搜索->HTTP

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 注意：我里面的网址是http://jcenter.bintray.com/com/sun/activation/javax.activation/1.2.0/javax.activation-1.2.0.pom

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 然后成功了，哈哈哈！！！！

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