https://rubygems.org/pages/download
http://rubyinstaller.org/downloads/
1.默认路径安装ruby186-26.exe
2.本地安装watir-1.4.1.gem,执行gem install watir-1.4.1.gem -l
3.本地安装rubygems-update-1.3.4.gem,执行 gem install rubygems-update-1.3.4.gem
4.更新rubygems,执行update_rubygems (这一步有影响再说)
5.本地安装 mime-types-1.15.gem,执行 gem install mime-types-1.15.gem
6.安装mailfactory,执行 gem install mailfactory(用于邮件发送模块)