Java 全文搜索引擎,Lucene 5.2.0 發布
Lucene 是apache軟件基金會一個開放源代碼的全文檢索引擎工具包,是一個全文檢索引擎的架構,提供了完整的查詢引擎和索引引擎,部分文本分析引擎。 Lucene的目的是為軟件開發人員提供一個簡單易用的工具包,以方便的在目標系統中實現全文檢索的功能,或者是以此為基礎建立起完整的全文檢索引擎。
Lucene 最初是由Doug Cutting所撰寫的,是一位資深全文索引/檢索專家,曾經是V-Twin搜索引擎的主要開發者,后來在Excite擔任高級系統架構設計師,目前從事 于一些INTERNET底層架構的研究。他貢獻出Lucene的目標是為各種中小型應用程式加入全文檢索功能。
Lucene 5.2.0 發布,該版本包含一些 bug 修復,優化,和一些改進,值得關注的如下:
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* Span queries now share document conjunction/intersection code with boolean queries, and use two-phased iterators for faster intersection by avoiding loading positions in certain cases.
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* Added two-phase support to SpanNotQuery, and SpanPositionCheckQuery and its subclasses: SpanPositionRangeQuery, SpanPayloadCheckQuery,
SpanNearPayloadCheckQuery, SpanFirstQuery. -
* Added a new query time join to the join module that uses global ordinals, which is faster for subsequent joins between reopens.
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* New CompositeSpatialStrategy combines speed of RPT with accuracy of SDV. Includes optimized Intersect predicate to avoid many geometry checks. Uses TwoPhaseIterator.
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* New LimitTokenOffsetFilter that limits tokens to those before a configured maximum start offset.
更多內容請查看更新日志。
該版本下載請點這里。
來自:http://www.oschina.net/news/63204/lucene-5-2-0