RequestDispatcher 的 forward和include

1、RequestDispatcher 的 forward和include：
http://www.avajava.com/tutorials/lessons/what-is-a-request-dispatcher-and-how-do-i-use-it.html?page=1
2、RequestDispatcher.forward()与HttpResponse.sendRedirect()的区别：
http://javarevisited.blogspot.hk/2011/09/sendredirect-forward-jsp-servlet.html