说明：  站内搜索已是网站必不可以的功能模块之一，本源代码采用lucene开发的一个简单的站内搜索示例，共大家来一起分享相互学习。
(Search is the Web site will not function modules, one of Lucene source code used to develop a simple Search example, a total of everyone to share and learn from each other.)