if you are just using http, then I think you are out of luck. Web server can only be informed when http sends something to it. If you are using applet, then you can add a listener to every action that you are interested in and the listener can tell a session bean what has happened.
设计一个程序知道用户在网页上的动作，然后服务器端做相应的
处理；这样做，要使用什么样的机制？
或者撇开这个问题，关于实时系统或者实时监控的原理之类的资料，
哪儿有？
If you are using applet, then you can add a listener to every action that you are interested in and the listener can tell a session bean what has happened.
简单了，你在网页中使用iframe 呀！
使用前台脚本 javascript 定时提交你要的数据，即你设置的表单中
数据了
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