外文原文Apache Lucene WebsiteLucene is a Java full-text search engine. Lucene is not a complete application, but rather a code library and API that can easily be used to add search capabilities to applications.This is the official documentation forApache Lucene 4.7.1. Additional documentation is available in theWiki.Getting StartedThe following section is intended as a getting started guide. It has three audiences: first-time users looking to install Apache Lucene in their application; developers looking to modify or base the applications they develop on Lucene; and developers looking to become involved in and contribute to the development of Lucene. The goal is to help you get started. It does not go into great depth on some of the conceptual or inner details of Lucene:Lucene demo, its usage, and sources: Tutorial and walk-through of the command-line Lucene demo.Introduction to Lucenes APIs: High-level summary of the different Lucene packages.Analysis overview: Introduction to Lucenes analysis API. See also theTokenStream consumer workflow.Reference DocumentsChanges: List of changes in this release.System Requirements: Minimum and supported Java versions.Migration Guide: What changed in Lucene 4; how to migrate code from Lucene 3.x.JRE Version Migration: Information about upgrading between major JRE versions.File Formats: Guide to the supported index format used by Lucene. This can be customized by usingan alternate codec.Search and Scoring in Lucene: Introduction to how Lucene scores documents.Classic Scoring Formula: Formula of Lucenes classicVector Spaceimplementation. (lookherefor other models)Classic QueryParser Syntax: Overview of the Classic QueryParsers syntax and features.API Javadocscore:Lucene core libraryanalyzers-common:Analyzers for indexing content in different languages and domains.analyzers-icu:Analysis integration with ICU (International Components for Unicode).analyzers-kuromoji:Japanese Morphological Analyzeranalyzers-morfologik:Analyzer for indexing Polishanalyzers-phonetic:Analyzer for indexing phonetic signatures (for sounds-alike search)analyzers-smartcn:Analyzer for indexing Chineseanalyzers-stempel:Analyzer for indexing Polishanalyzers-uima:Analysis integration with Apache UIMAbenchmark:System for benchmarking Luceneclassification:Classification module for Lucenecodecs:Lucene codecs and postings formats.demo:Simple example codeexpressions:Dynamically computed values to sort/facet/search on based on a pluggable grammar.facet:Faceted indexing and search capabilitiesgrouping:Collectors for grouping search results.highlighter:Highlights search keywords in resultsjoin:Index-time and Query-time joins for normalized contentmemory:Single-document in-memory index implementationmisc:Index tools and other miscellaneous codequeries:Filters and Queries that add to core Lucenequeryparser:Query parsers and parsing frameworkreplicator:Files replication utilitysandbox:Various third party contributions and new ideasspatial:Geospatial searchsuggest:Auto-suggest and Spellchecking supporttest-framework:Framework for testing Lucene-based applicationsLucene 4.7.1 core APIApache Lucene is a high-performance, full-featured text search engine library.See:DescriptionPackagesorg.apache.luceneTop-level package.org.apache.lucene.analysisAPI and code to convert text into indexable/searchable tokens.org.apache.lucene.analysis.tokenattributesGeneral-purpose attributes for text analysis.org.apache.lucene.codecsCodecs API: API for customization of the encoding and structure of the index.org.apache.lucene.codecs.compressingStoredFieldsFormat that allows cross-document and cross-field compression of stored fields.org.apache.lucene.codecs.lucene3xCodec to support Lucene 3.x indexes (readonly)org.apache.lucene.codecs.lucene40Lucene 4.0 file format.org.apache.lucene.codecs.lucene41Lucene 4.1 file format.org.apache.lucene.codecs.lucene42Lucene 4.2 file format.org.apache.lucene.codecs.lucene45Lucene 4.5 file format.org.apache.lucene.codecs.lucene46Lucene 4.6 file format.org.apache.lucene.codecs.perfieldPostings format that can delegate to different formats per-field.org.apache.lucene.documentThe logical representation of aDocumentfor indexing and searching.org.apache.lucene.indexCode to maintain and access indices.org.apache.lucene.searchCode to search indices.org.apache.lucene.search.payloadsThe payloads package provides Query mechanisms for finding and using payloads.org.apache.lucene.search.similaritiesThis package contains the various ranking models that can be used in Lucene.org.apache.lucene.search.spansThe calculus of spans.org.apache.lucene.storeBinary i/o API, used for all index data.org.apache.lucene.utilSome utility classes.org.apache.lucene.util.automatonFinite-state automaton f