Netty-WebSocket长连接推送服务
http://blog.csdn.net/z69183787/article/details/52505249
http://blog.csdn.net/haoyuyang/article/details/53243785
http://blog.csdn.net/column/details/enjoynetty.html
异步消息框架netty
原文：http://www.cnblogs.com/wuer888/p/7851063.html
