http://www.infoq.com/cn/articles/java-threadPool
http://blog.csdn.net/clevergump/article/details/50688008
http://blog.csdn.net/pangjiuzala/article/details/49556081
http://blog.csdn.net/wojiaolinaaa/article/details/51345789
http://blog.csdn.net/liuguangqiang/article/details/52169926
原文：http://www.cnblogs.com/thxu/p/7406992.html