ruby -v
ruby 2.1.5p273 (2014-11-13 revision 48405) [i386-mingw32]

rails -v
Fetching source index from http://gems.ruby-china.com/
Resolving dependencies...
Could not verify the SSL certificate for
https://gems.ruby-china.com/quick/Marshal.4.8/unf-0.1.4-java.gemspec.rz.
There is a chance you are experiencing a man-in-the-middle attack, but most
likely your system doesn't have the CA certificates needed for verification. For
information about OpenSSL certificates, see bit.ly/ruby-ssl. To connect without
using SSL, edit your Gemfile sources and change 'https' to 'http'.

这个在 Window 下 ssl 的问题，如何处理？？？