实现http长连接，有源码，可直接运行，熟悉java语言，很快掌握socket编程-Achieve long http connection, there is source code, can be directly run

dwr高级功能展示，反向ajax，长连接处理-DWR advanced features to display, reverse ajax, long connection handling

http很难实现长连接。利用DWR反推技术实现。jsp页面上即时聊天，供大家对DWR反推技术的研究-http difficult to achieve a long connection. Anti-push technology using DWR. jsp page even chat for everyone on the backstepping technique of DWR

一个简单的pushlet消息推送，后台传入要推送的内容，然后前台无刷新使用ajax长连接来获取到，非常使用，适用于一般的网站站内消息。-A simple pushlet message push, backstage pass to push, then the front desk without refresh using ajax long connection to get to very applicable to the general station' s website m