Lucene Small Example

 Packageorg.itat.test;ImportJava.io.File;ImportJava.io.FileReader;Importjava.io.IOException;ImportOrg.apache.lucene.analysis.standard.StandardAnalyzer;Importorg.apache.lucene.document.Document;ImportOrg.apache.lucene.document.Field;Importorg.apache.lucene.index.CorruptIndexException;ImportOrg.apache.lucene.index.IndexReader;ImportOrg.apache.lucene.index.IndexWriter;ImportOrg.apache.lucene.index.IndexWriterConfig;Importorg.apache.lucene.queryParser.ParseException;ImportOrg.apache.lucene.queryParser.QueryParser;ImportOrg.apache.lucene.search.IndexSearcher;ImportOrg.apache.lucene.search.Query;ImportOrg.apache.lucene.search.ScoreDoc;ImportOrg.apache.lucene.search.TopDocs;Importorg.apache.lucene.store.Directory;Importorg.apache.lucene.store.FSDirectory;Importorg.apache.lucene.store.LockObtainFailedException;Importorg.apache.lucene.store.RAMDirectory;Importorg.apache.lucene.util.Version; Public classhellolucene{/*** Build Index *@throwsIOException *@throwscorruptindexexception*/     Public voidIndex ()throwscorruptindexexception, IOException {//1. Create a directoryDirectory directory =NewRamdirectory ();//built in-memory//Directory directory = fsdirectory.open (new File ("d:/lucene1/index01")); //2. Create IndexWriterIndexwriterconfig IWC =NewIndexwriterconfig (version.lucene_35,NewStandardAnalyzer (version.lucene_35)); IndexWriter writer=NULL; Try{writer=NewIndexWriter (directory, IWC); //3. Create a Document ObjectDocument doc =NULL; //4. Add field to documentFile f =NewFile ("D:/lucene");  for(File file:f.listfiles ()) {doc=NewDocument (); Doc.add (NewField ("Content",Newfilereader (file)); Doc.add (NewField ("filename", File.getname (), Field.Store.YES, Field.Index.NOT_ANALYZED)); Doc.add (NewField ("Path", File.getabsolutepath (), Field.Store.YES, Field.Index.NOT_ANALYZED)); //5. Adding documents to the index via IndexWriterWriter.adddocument (DOC); }                    }        Catch(corruptindexexception e) {//TODO Auto-generated catch blockE.printstacktrace (); }        Catch(lockobtainfailedexception e) {//TODO Auto-generated catch blockE.printstacktrace (); }        Catch(IOException e) {//TODO Auto-generated catch blockE.printstacktrace (); }        finally        {            if(Writer! =NULL) {writer.close (); }}} @SuppressWarnings ("Resource")     Public voidSearch ()throwsParseException {//1. Create a directoryDirectory directory;        Indexreader reader; Try{directory= Fsdirectory.open (NewFile ("d:/lucene1/index01")); //2. Create IndexreaderReader =indexreader.open (directory); //3. Create Indexsearcher according to Indexreader//4. Create a query for the searchQueryparser parser =NewQueryparser (version.lucene_35, "content",NewStandardAnalyzer (version.lucene_35)); //Create a parser to determine the contents of the file to search for, the second parameter represents the domain of the search//Create a query that indicates that the search domain is a document containing Java in contentQuery query = parser.parse ("com"); //5. Search by sea man and return to TopdocsTopdocs TDS =NewIndexsearcher (reader). Search (Query, 100); //6. Get Scoredoc objects based on Topdocsscoredoc[] SDS =Tds.scoredocs;  for(Scoredoc Sd:sds) {//7. Get specific document objects based on searcher and Scoredoc objectsDocument d =Newindexsearcher (reader). doc (Sd.doc); //8. Get the values you want based on the Document objectSystem.out.println (D.get ("filename") + "[" + D.get ("path") + "]"); }                                                           //9. Close ReaderReader.close (); }        Catch(IOException e) {//TODO Auto-generated catch blockE.printstacktrace (); }    }}

Test class:

 Packageorg.itat.test;Importjava.io.IOException;Importorg.apache.lucene.index.CorruptIndexException;Importorg.apache.lucene.queryParser.ParseException;Importorg.junit.Test; Public classtestlucene{@Test Public voidTestindex ()throwscorruptindexexception, IOException, parseexception {hellolucene hl=NewHelloLucene ();    Hl.index (); } @Test Public voidTestsearcher ()throwsparseexception {hellolucene hl=NewHelloLucene ();//Hl.index ();Hl.search (); }}

Lucene Small Example