<a target="_blank" href="http://blog.csdn.net/kongqz/article/details/7872247">http://blog.csdn.net/kongqz/article/details/7872247</a>
<a target="_blank" href="http://lichengguizy.blog.163.com/blog/static/1177185862010424126784/">http://lichengguizy.blog.163.com/blog/static/1177185862010424126784/</a>
<a target="_blank" href="http://www.cnblogs.com/know/p/3256837.html">http://www.cnblogs.com/know/p/3256837.html</a>
<a target="_blank" href="http://ruby-china.org/topics/5937">http://ruby-china.org/topics/5937</a>
<a target="_blank" href="http://www.cnblogs.com/mmmjiang13/archive/2010/11/04/1868609.html">http://www.cnblogs.com/mmmjiang13/archive/2010/11/04/1868609.html</a>