自己写的Lucene实例

建立索引

public class Indexer {

  public static void main(String[] args) throws Exception {
   /* if (args.length != 2) {
      throw new IllegalArgumentException("Usage: java " + Indexer.class.getName()
        + " <index dir> <data dir>");
    }*/
    String indexDir = "F:\\index";         //1
    String dataDir = "F:\\";          //2

    long start = System.currentTimeMillis();
    
    Indexer indexer = new Indexer(indexDir);
    
    int numIndexed;
    
    try {
      numIndexed = indexer.index(dataDir, new TextFilesFilter());
    }
    
    finally {
      indexer.close();
    }
    long end = System.currentTimeMillis();

    System.out.println("Indexing " + numIndexed + " files took "
      + (end - start) + " milliseconds");
  }

  private IndexWriter writer;
  
  public Indexer(String indexDir) throws IOException {
    Directory dir = FSDirectory.open(new File(indexDir));
    writer = new IndexWriter(dir,            //3
               new IKAnalyzer()  ,//3
                 true,                       //3
                             IndexWriter.MaxFieldLength.LIMITED); //3
  }

  public void close() throws IOException {
    writer.close();                             //4
  }

  public int index(String dataDir, FileFilter filter)
    throws Exception {

    File[] files = new File(dataDir).listFiles();

    for (File f: files) {
      if (!f.isDirectory() &&
          !f.isHidden() &&
          f.exists() &&
          f.canRead() &&
          (filter == null || filter.accept(f))) {
        
    	  indexFile(f);
      }
    }

    return writer.numDocs();                     //5
  }

  private static class TextFilesFilter implements FileFilter {
    public boolean accept(File path) {
      return path.getName().toLowerCase()        //6
             .endsWith(".txt");                  //6
    }
  }

  protected Document getDocument(File f) throws Exception {
    Document doc = new Document();
    
    doc.add(new Field("content-value", new FileReader(f)));      //7
    
    doc.add(new Field("filename", f.getName(), //8
               Field.Store.YES, Field.Index.NOT_ANALYZED));//8
  
    doc.add(new Field("fullpath", f.getCanonicalPath(),     //9
               Field.Store.YES, Field.Index.NOT_ANALYZED));//9
    return doc;
  }

  private void indexFile(File f) throws Exception {
    System.out.println("Indexing " + f.getCanonicalPath());
    Document doc = getDocument(f);
    writer.addDocument(doc);                              //10
  }
}

 查询

public class Index {

  public static void main(String[] args) throws IllegalArgumentException,
        IOException, ParseException {
	
	String indexDir = "F:\\index";   
	String q="徐剑锋";
    search(indexDir, q);
  }


  public static void search(String indexDir, String q)
    throws IOException, ParseException {

    Directory dir = FSDirectory.open(new File(indexDir)); 
	IndexSearcher  is=new IndexSearcher(dir);
    
	is.setSimilarity(new IKSimilarity());
  
	QueryParser parser = new QueryParser(Version.LUCENE_30, 
                                        "content-value",  
                  new IKAnalyzer());  
    Query query = IKQueryParser.parse("content-value", q);            
  
    // Query query=parser.parse(q);
     
     long start = System.currentTimeMillis();
     
     TopDocs hits = is.search(query, 10); 
     
     long end = System.currentTimeMillis();

    System.out.println("Found " + hits.totalHits +     
      " document(s) (in " + (end - start) +        
      " milliseconds) that matched query '" +     
      q + "':");                                   

    for(ScoreDoc scoreDoc : hits.scoreDocs) {
      Document doc = is.doc(scoreDoc.doc);      
      System.out.println(doc.get("fullpath"));  
    	}
    is.close();
  
  
  }
}