java实现的全文搜索引擎，实现了多种语法的查询，支持建立索引，然后用另外的线程调用，速度快，返回的结果支持多种排序算法。 -java to achieve the full text search engine, to achieve a wide range of query syntax, support for the establishment of the index, and then call another thread speed, the results support t