Lucene 5.3.0 发布，Java 全文搜索框架
欢迎加入运维网交流群:263444886Lucene 5.3.0 发布，此版本值得关注的更新如下：
API 改进：PhraseQuery 和 BooleanQuery 不可变
新特性：
[*]
Added a new org.apache.lucene.search.join.CheckJoinIndex>
[*] Added a new BlendedTermQuery to blend statistics across several terms
[*] New common suggest API that mirrors Lucene's Query/IndexSearcher APIsfor Document based suggester.
[*] IndexWriter can now be initialized from an already open near-real-time or non-NRT reader
[*] Add experimental range tree doc values format and queries, based on a1D version of the spatial BKD tree, for a faster and smaller alternative to postings-based numeric and binary term filtering. Range trees can also handle values larger than 64 bits.
Geo 相关特性和改进：
[*] Added GeoPointField, GeoPointInBBoxQuery, GeoPointInPolygonQuery for simple "indexed lat/lon point in bbox/shape" searching
[*] Added experimental BKD geospatial tree doc values format and queries,for fast "bbox/polygon contains lat/lon points"
[*] Use doc values to post-filter GeoPointField hits that fall in boundary cells, resulting in smaller index, faster searches and less heap used for each query
优化：
[*] Reduce RAM usage of FieldInfos, and speed up lookup by number, by using an array instead of TreeMap except in very sparse cases
[*] Faster intersection of the terms dictionary with very finite automata, which can be generated eg. by simple regexp queries
[*]
Various bugfixes and optimizations since the 5.2.0>
下载：http://www.apache.org/dyn/closer.cgi/lucene/java/5.3.0
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
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