I should pay more attention to following java technologies , focusing on the advantage of these technologies.
DWR 1.0
Prototype 1.4.0
Scriptaculous 1.5.1
Acegi Security 1.0
pageFlow, Continuation --> spring WebFlow(http://java.chinaitlab.com/WebServices/33768.html)
Loadrunner＋JProbe 测试 session导致的内存浪费问题
hibernate query cache， Lightor Query Cache.
规则引擎或者脚本引擎