lucene的检索算法属于索引检索，即用空间来换取时间，对需要检索的文件、字符流进行全文索引，在检索的时候对索引进行快速的检索，得到检索位置，这个位置记录检索词出现的文件路径或者某个关键词。

-Lucene search algorithm belonging to Index Search, which uses space in exchange for time on the need to retrieve a document, character stream full-text index, in the retrieval time of the index for fast retrieval, the retrieval location, this location records the word appears in document retrieval path or a Key.