Blob、InputStream、byte 互转

本文URL: http://blog.csdn.net/sukyle/article/details/5632713
参考URL:
http://topic.csdn.net/u/20081210/11/fb6c51f7-dcbc-4b3d-a6fc-1a98bc0de072.html
http://cping1982.blog.51cto.com/601635/130046
http://www.velocityreviews.com/forums/t144173-convert-byte-to-byte.html
http://bbs.chinaunix.net/forum.php?mod=viewthread&tid=770516