非原创,方便以后学习,特放在这里:
衔接地址:http://www.cnblogs.com/laipdidi/articles/2074067.html
http://blog.csdn.net/gaoyunpeng/article/details/2043871
Iteye里面的:
http://run-wang.iteye.com/blog/1491405
http://1035054540-qq-com.iteye.com/blog/1490960
http://1035054540-qq-com.iteye.com/blog/1490960