这篇文章不错
http://www.importnew.com/14111.html java io底层是如何实现的
http://blog.csdn.net/zxman660/article/details/7875762
http://ifeve.com/overview/
https://www.ibm.com/developerworks/cn/education/java/j-nio/ nio入门
java io流面试题和选择题: http://blog.csdn.net/bubble1210/article/details/50839845
阿里巴巴:http://blog.csdn.net/natian306/article/details/10858097