说明：  基于Java的全文索引/检索引擎——Lucene Lucene不是一个完整的全文索引应用，而是是一个用Java写的全文索引引擎工具包，它可以方便的嵌入到各种应用中实现针对应用的全文索引/检索功能。
(Java-based full-text indexing/search engine- Lucene Lucene is not a complete application of the full-text indexing, but to use Java to write a full-text indexing engine of the toolkit, it can be easily embedded into a wide range of applications in the realization of the full-text index for the application of/search function.)