http://xueshu.baidu.com/s?wd=paperuri%3A%281c7decf0c6e30a813d7b264d08f00e69%29&filter=sc_long_sign&tn=SE_xueshusource_2kduw22v&sc_vurl=http%3A%2F%2Fwenku.baidu.com%2Fview%2Fa5757018ff00bed5b9f31db5.html&ie=utf-8&sc_us=13672769585375173010
小黑的OOP系列
http://xueshu.baidu.com/s?wd=paperuri%3A%281c7decf0c6e30a813d7b264d08f00e69%29&filter=sc_long_sign&tn=SE_xueshusource_2kduw22v&sc_vurl=http%3A%2F%2Fwenku.baidu.com%2Fview%2Fa5757018ff00bed5b9f31db5.html&ie=utf-8&sc_us=13672769585375173010
小黑的OOP系列