前台监控 后台推送即时信息

1.dwr

   内容正在建设中，研究中......

   http://wangsf150.blog.163.com/blog/static/501495752012213101139444/

   http://www.myexception.cn/program/667623.html

2.Comet4j

   http://www.myexception.cn/software-architecture-design/1338860.html

3.pushlet

   http://www.myexception.cn/software-architecture-design/1355023.html

   http://www.myexception.cn/program/667656.html