검색엔진 루씬 lucene & hadoop

package com.gruter.lia.meetlucene;

import java.io.File;
import java.util.Date;

import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.queryParser.QueryParser;
import org.apache.lucene.search.Hits;
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.Directory;
import org.apache.lucene.store.FSDirectory;


/**
* Lucene version 2.4
* Lucene In Action 1.4.2 색인 내의 검색 코드에 대한 버전 수정본
**/
public class Searcher {
      public static void main(String[] args) throws Exception {
            if (args.length != 2) {
              throw new Exception("Usage: java " + Searcher.class.getName()
                + " <index dir> <query>");
            }

            File indexDir = new File(args[0]);
            String q = args[1];

            if (!indexDir.exists() || !indexDir.isDirectory()) {
              throw new Exception(indexDir +
                " does not exist or is not a directory.");
            }

            search(indexDir, q);
          }

          public static void search(File indexDir, String q)
            throws Exception {
//            Directory fsDir = FSDirectory.getDirectory(indexDir, false);
            Directory fsDir = FSDirectory.getDirectory(indexDir);
            IndexSearcher is = new IndexSearcher(fsDir);

//            Query query = QueryParser.parse(q, "contents",
//              new StandardAnalyzer());
            QueryParser parser = new QueryParser("contents", new StandardAnalyzer());
            Query query = parser.parse(q);
            long start = new Date().getTime();
//            Hits hits = is.search(query);
            TopDocs docs = is.search(query, 100);
            long end = new Date().getTime();

//            System.err.println("Found " + hits.length() +
//              " document(s) (in " + (end - start) +
//              " milliseconds) that matched query '" +
//                q + "':");
//
//            for (int i = 0; i < hits.length(); i++) {
//              Document doc = hits.doc(i);
//              System.out.println(doc.get("filename"));
//            }

            System.err.println("Found " + docs.totalHits +
              " document(s) (in " + (end - start) +
              " milliseconds) that matched query '" +
                q + "':");
            ScoreDoc[] scores = docs.scoreDocs;
            float maxScore = docs.getMaxScore();
            for (int i=0 ;i<docs.scoreDocs.length;i++){           
                Document doc = is.doc(docs.scoreDocs[i].doc);
                  System.out.println(doc.get("filename"));
            }
          }
}