Common_Pool

http://macrochen.iteye.com/blog/320077

http://blackproof.iteye.com/blog/1525228

http://hi.baidu.com/moolong/item/8d5639c561a2a37c89ad9ec7

http://blog.csdn.net/kongxx/article/details/6607083

http://vaporz.blog.51cto.com/3142258/706945

http://www.cnblogs.com/xiuyusoft/archive/2011/06/17/2083616.html

http://hithoper.blog.hexun.com/13294024_d.html

http://blog.csdn.net/bryantd/article/details/1100019