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);
}
}
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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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