Lucene 5.2.0 发布,该版本包含一些 bug 修复,优化,和一些改进,值得关注的如下:
*
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. * 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. *
New CompositeSpatialStrategy combines speed of RPT with accuracy of
SDV. Includes optimized Intersect predicate to avoid many geometry
checks. Uses TwoPhaseIterator. * New LimitTokenOffsetFilter that limits tokens to those before a configured maximum start offset.
更多内容请查看更新日志。 该版本下载请点这里。 Lucene
是apache软件基金会一个开放源代码的全文检索引擎工具包,是一个全文检索引擎的架构,提供了完整的查询引擎和索引引擎,部分文本分析引擎。
Lucene的目的是为软件开发人员提供一个简单易用的工具包,以方便的在目标系统中实现全文检索的功能,或者是以此为基础建立起完整的全文检索引擎。 Lucene
最初是由Doug
Cutting所撰写的,是一位资深全文索引/检索专家,曾经是V-Twin搜索引擎的主要开发者,后来在Excite担任高级系统架构设计师,目前从事
于一些INTERNET底层架构的研究。他贡献出Lucene的目标是为各种中小型应用程式加入全文检索功能。 OSChina 使用 Lucene 实现全文搜索。 在线Javadoc:http://tool.oschina.net/apidocs/apidoc?api=lucene-3.6.0 |