Lucene example, Lucene demo, Lucene tutorial

Looked up a lot of lucene data, wondering why can't share a simple example, I wrote a

Lucene implementation is actually very simple, first indexed, in the search, easy!

Download the jar package, Link here: http://download.csdn.net/detail/dannor2010/8183641 project to import Lib, not much to say. Upfront: Create two txt files,

C:\\source

C:\\index

Create a TXT file in source and enter the string type of content you want to test the search for.

1, build the index, the code is as follows

Package Com.ch.lucene;import Java.io.file;import Java.io.filereader;import java.util.date;import Org.apache.lucene.analysis.analyzer;import Org.apache.lucene.analysis.standard.standardanalyzer;import Org.apache.lucene.document.document;import Org.apache.lucene.document.field;import Org.apache.lucene.index.indexwriter;import Org.apache.lucene.index.indexwriterconfig;import Org.apache.lucene.index.indexwriterconfig.openmode;import Org.apache.lucene.store.directory;import Org.apache.lucene.store.fsdirectory;import Org.apache.lucene.util.version;import Com.ch.util.FileUtil;public Class Textfileindexer {@SuppressWarnings ("deprecation") public static void main (string[] args) throws Exception {File Filedir = new File ("C:\\source"); File FileIndex = new file ("C:\\index");D irectory dir = Fsdirectory.open (FileIndex); Analyzer Luceneanalyzer = new StandardAnalyzer (version.lucene_45); Indexwriterconfig IWC = new Indexwriterconfig ( Version.lucene_45,luceneanalyzer); Iwc.setopenmode (openmode.create); IndexWriter IW = new IndexWriter (dir, IWC); file[] Textfiles = Filedir.listfiles (); Long startTime = new Date (). GetTime ();//Add document to index go for (File file:textfiles) {if (File.isfile () && file.getname (). EndsWith (". txt")) {System.out.println ("file:" + file.getcanonicalpath () + " The operation is being indexed. "); String temp = Fileutil.readtxtfile (File.getpath ()); System.out.println (temp);D ocument document = new Document (), @SuppressWarnings ("unused") field filepath = new Field (" Path ", File.getpath (), Field.Store.YES, Field.Index.NO); Field fieldbody = new Field ("Body", temp, Field.store.yes,field.index.analyzed,field.termvector.with_positions_ Offsets);d Ocument.add (filepath);d ocument.add (fieldbody); iw.adddocument (document);} Iw.close ();//test the time of the index long endTime = new Date (). GetTime (); SYSTEM.OUT.PRINTLN ("This cost" + (Endtime-starttime) + "milliseconds to add the document to the index" + filedir.getpath ());}}

2, search, the code is as follows

Package Com.ch.lucene;import Java.io.file;import Java.io.ioexception;import Org.apache.lucene.analysis.Analyzer; Import Org.apache.lucene.analysis.standard.standardanalyzer;import Org.apache.lucene.index.indexreader;import Org.apache.lucene.queryparser.classic.parseexception;import Org.apache.lucene.queryparser.classic.QueryParser; Import Org.apache.lucene.search.indexsearcher;import Org.apache.lucene.search.scoredoc;import Org.apache.lucene.search.topdocs;import Org.apache.lucene.store.fsdirectory;import Org.apache.lucene.util.version;public class Query {public static void main (string[] args) throws IOException, parseexception {String index = "C:\\index"; @SuppressWarnings ("deprecation") Indexreader reader = Indexreader.open ( Fsdirectory.open (index)); Indexsearcher searcher = new Indexsearcher (reader); Scoredoc[] hits = null; String queryString = "keywords"; Search Keywords Analyzer analyzer = new StandardAnalyzer (version.lucene_45); Queryparser QP = new Queryparser (version.lucene_45, "body", anAlyzer); Org.apache.lucene.search.Query Query = Qp.parse (queryString); if (searcher! = null) {Topdocs results = Searcher.search (query); hits = results.scoredocs;if (Hits.length > 0) {System.out.println ("found:" + Hits.length);}}}

Lucene example, Lucene demo, Lucene tutorial