http://blog.runphp.net/archives/156
http://wenku.baidu.com/link?url=yvd3_EpMM66r6H4qkx3oqcaU2JZNAQv_aE3HfLwhF2r5afLUH884jaRRryGe2x6N9pYwFcpjDyhezT9WPFWrgPEWcPt7yHMCeeJ-OMWnmVW
http://www.blogjava.net/libin2722/articles/338316.html
参照上述内容,自己写的:
http://files.cnblogs.com/diyunpeng/Ip%E5%AE%9A%E4%BD%8D.rar
SimpleCache
http://svn.igniterealtime.org/svn/repos/openfire/trunk/src/java/org/jivesoftware/util/cache/DefaultCache.java