Hi Andre,
you are using StandardAnalyzer for indexing but you search with an
un-analyzed string "Lucene" (q.add(new Term("title","Lucene"));)
If you pass this string to the query parser your query string will be
analyzed (will most likely result in a lowercased string). The
analyzed query will then match and retrieve your documents. try to
search :
> PhraseQuery q = new PhraseQuery();
> q.setSlop(1);
> q.add(new Term("title","lucene"));
> q.add(new Term("title","for"));
simon
.
2010/1/5 Mário André <mario...@infonet.com.br>:
> Hi,
> I need search by phrase containing a particular sequence of terms , then I
> am using Java Lucene 3.0, more specifically the PhraseQuery.
> I'm using the code below, but does not work(PhraseQuery). Only does work
> when I use the QueryParser:
> Is there some problem or how can I use the PhraseQuery in Lucene 3.0?
> public class Main1 {
>
> /**
> * @param args the command line arguments
> */
> public static void main(String[] args) throws IOException,
> ParseException
> {
> StandardAnalyzer analyzer = new
> StandardAnalyzer(Version.LUCENE_CURRENT);
>
> // 1. create the index
> Directory index = new RAMDirectory();
>
> IndexWriter w = new IndexWriter(index, analyzer, true,
> IndexWriter.MaxFieldLength.UNLIMITED);
>
> addDoc(w, "Lucene in Action for about ten days here in brazil kkkkkkk
> eeeeeeee nnnn xxxx tttt dddd jjjjjjj k");
> addDoc(w, "Lucene for Dummies");
> addDoc(w, "Lucene for Dummies");
> addDoc(w, "Managing Gigabytes");
>
> w.close();
>
> // 2. query
> //Query q = new QueryParser(Version.LUCENE_CURRENT, "title",
> analyzer).parse(querystr);
>
> PhraseQuery q = new PhraseQuery();
> q.setSlop(1);
> q.add(new Term("title","Lucene"));
> q.add(new Term("title","for"));
>
>
> // 3. search
> int hitsPerPage = 20;
> IndexSearcher searcher = new IndexSearcher(index, true);
> TopScoreDocCollector collector =
> TopScoreDocCollector.create(hitsPerPage, true);
> searcher.search(q, collector);
> ScoreDoc[] hits = collector.topDocs().scoreDocs;
>
> // 4. display results
> System.out.println("Found " + hits.length + " hits.");
> for(int i=0;i<hits.length;++i) {
> int docId = hits[i].doc;
> Document d = searcher.doc(docId);
> System.out.println((i + 1) + ". " + d.get("title"));
> }
>
> searcher.close();
> }
>
> private static void addDoc(IndexWriter w, String value) throws IOException
> {
> Document doc = new Document();
> doc.add(new Field("title", value, Field.Store.YES,
> Field.Index.ANALYZED));
> w.addDocument(doc);
> }
>
> }
>
> ---------------------------------------------------------------------
> Mário André
> Instituto Federal de Educação, Ciência e Tecnologia de Sergipe - IFS
> Mestrando em MCC - Universidade Federal de Alagoas - UFAL
> http://www.marioandre.com.br/
> Skype: mario-fa
> ----------------------------------------------------------------------------
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>
>
>
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