摘要： http://www.cnblogs.com/phphuaibei/archive/2011/09/27/2193548.htmlhttp://blog.csdn.net/cschmin/article/details/5972239http://www.cnblogs.com/jacklondon/archive/2010/12/07/1899312.html不错的总结，记录下来~~ 阅读全文