<p>rufus-scheduler 是一个简简单单在rails中做定时任务的程序包，基本上可以解决我们日常中的定时任务，rufus-scheduler当然也支持某个时间点做某事，某个时间段做某事等等</p>    <p>安装方法：gem install rufus-scheduler</p>    <p>示例代码：</p>    <pre class="brush:ruby; toolbar: true; auto-links: false;">  require 'rubygems'   require 'rufus/scheduler'    scheduler = Rufus::Scheduler.start_new    scheduler.in '20m' do     puts "order ristretto"   end    scheduler.at 'Thu Mar 26 07:31:43 +0900 2009' do     puts 'order pizza'   end    scheduler.cron '0 22 * * 1-5' do     # every day of the week at 22:00 (10pm)     puts 'activate security system'   end    scheduler.every '5m' do     puts 'check blood pressure'   end</pre>    <p><strong>项目主页：</strong><a href="http://www.open-open.com/lib/view/home/1327499250890" target="_blank">http://www.open-open.com/lib/view/home/1327499250890</a></p>    <p></p>