A simple standard test for Lucene (Lucene package based on 3.5 version)

Lucene programming is generally divided into: index, word segmentation, search

Index Source code:

A standard test of the package lucene; import Java.io.bufferedreader;import java.io.file;import Java.io.fileinputstream;import Java.io.ioexception;import Java.io.inputstreamreader;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;public class TextFileIndexer {public static void Main (string[] args) throws Exception {//source file location required for index, file Filedir = new file ("E:\\lucene\\source");//location of the file where the index is stored f Ile Indexdir = new File ("E:\\lucene\\index");//Set the index on the hard disk directory dir = fsdirectory.open (Indexdir);// Establish a standard word breaker analyzer Luceneanalyzer = new StandardAnalyzer (version.lucene_35);//indexwriterconfigIWC = new Indexwriterconfig (version.lucene_35,luceneanalyzer);//Each execution creates a new index instead of an append index Iwc.setopenmode ( openmode.create);//Create an indexer indexwriter indexwriter = new IndexWriter (dir, IWC);//Save multiple files from the source file to the array file[] file[ = Filedir.listfiles ();//The start time of the index is long startTime = new Date (). GetTime ();//For looping through files in source directory for (int i = 0; i < Textfiles.le Ngth; i++) {if (Textfiles[i].isfile () && textfiles[i].getname (). EndsWith (". txt")) {//Get relative path??? System.out.println ("File" + textfiles[i].getcanonicalpath () + "indexing ...");//Call Custom Read file contents Method Filereaderall () String temp = Filereaderall (Textfiles[i].getcanonicalpath (), "GBK");//Print the contents of the Read System.out.println (temp);// Establish a Document object for each file's index information document document = new document ();//file path index: Simply store index without path, because we do not need to query the path field Fieldpath = new Field ("Path", Textfiles[i].getpath (), Field.Store.YES, Field.Index.NO);//file Content index: Field fieldbody = new Field ("Body", temp, field.store.yes,field.index.analyzed,field.termvector.with_positions_offsets);//Add each field to the Document object DocumeNt.add (Fieldpath);d ocument.add (fieldbody);//write the document to the index indexwriter.adddocument (document);}} Close Indexwriter.close ();//test the index time long endTime = new Date (). GetTime ();//getpath,getabsolutepath, Getcanonicalpath's differences refer to the reproduced article System.out.println ("spents:" + (Endtime-starttime) + "milliseconds to add the document to the index," +filedir.getpath ()); System.out.println ("spents:" + (Endtime-starttime) + "milliseconds to add the document to the index," +filedir.getabsolutepath ()); System.out.println ("spents:" + (Endtime-starttime) + "milliseconds to add the document to the index," +filedir.getcanonicalpath ());} Custom method for reading the contents of a file Filereaderall () public static string Filereaderall (String FileName, String charset) throws IOException { BufferedReader reader = new BufferedReader (new InputStreamReader (New FileInputStream (FileName), CharSet));// Read charset:gbkstring line = new String (); String temp = new String (), while (line = Reader.readline ()) = null) {temp + = line;} Reader.close (); return temp;}}

Search Source code:

One standard test of the package 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.parseexception;import Org.apache.lucene.queryparser.queryparser;import Org.apache.lucene.search.indexsearcher;import Org.apache.lucene.search.query;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 TestQuery {public static void Main (string[] args) throws ioexception,parseexception{//Search index path String index = "E:\\index"; indexreader reader = Indexreader.open (Fsdirectory.open (index));//define Searcherindexsearcher for queries in the index library searcher = new Indexsearcher (reader); Scoredoc[] hits = null;//search term string querystring= "absolute Autumn Fragrance";//Declaring Query object query query = null;//Word breaker Analyzer Analyzer = new Standard Analyzer (version.lucene_35); try {QueryParser QP = new Queryparser (version.lucene_35, "body", analyzer); query = Qp.parse (queryString);} catch (ParseException e) {e.printstacktrace ();} if (searcher!=null) {Topdocs results = searcher.search (query, ten); hits = Results.scoredocs;if (hits.length>0) { System.out.println ("Find hits.length=" +hits.length+ "results \ n" + "find results.totalhits=" +results.totalhits);} Searcher.close ();}}}

A simple standard test for Lucene (Lucene package based on 3.5 version)