Apache Lucene 5.5.0 发布，Java 搜索引擎
Apache Lucene 5.5.0 发布了，该版本包含 bug 修复、优化和改进，值得关注的内容有：
* JoinUtil.createJoinQuery can now join on numeric doc values fields
* BlendedInfixSuggester now has an exponential reciprocal scoring
model, to more strongly favor suggestions with matches closer to the
beginning
* CustomAnalyzer has improved (compile time) type safety
* DFISimilarity implements the divergence from independence scoring model
* Fully wrap any other merge policy using MergePolicyWrapper
* Sandbox geo point queries have graduated into the spatial module,
and now use a more efficient binary term encoding for smaller index
size, faster indexing, and decreased search-time heap usage
* BooleanQuery performs some new query optimizations
* TermsQuery constructors are more GC efficient
完整记录请看：https://lucene.apache.org/core/5_5_0/changes/Changes.html
下载地址：http://lucene.apache.org/core/mirrors-core-latest-redir.html