autolink会做到这一点。它被提取到它自己的宝石中......

autolink will do it. It's been extracted into it's own gem...

https： //github.com/tenderlove/rails_autolink

示例用法：

auto_link("Go to http://www.rubyonrails.org and say hello to david@loudthinking.com")
# => "Go to <a href=\"http://www.rubyonrails.org\">http://www.rubyonrails.org</a> and
#     say hello to <a href=\"mailto:david@loudthinking.com\">david@loudthinking.com</a>"