1，安裝依賴包

★問題：Unable to download data from https://rubygems.org/ - SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed (https://api.rubygems.org/specs.4.8.gz)

解決辦法：

?執行命令：

gem sources -r https://rubygems.org

gem sources -a http://rubygems.org

安裝完后，改回來：

gem sources -r http://rubygems.org

gem sources -a https://rubygems.org

使用國內提供的RubyGems鏡像源，提速：

gem sources -r https://rubygems.org/

gem sources -a http://ruby.taobao.org/