Question

我是lucene环境中的新手并使用tutorial。

1- Indexer.java类用于索引原始数据，以便我们可以使用lucene库对其进行搜索。

2- LuceneConstants.java类用于提供在示例应用程序中使用的各种常量。

3- Searcher.java类用于搜索Indexer创建的索引以搜索请求的内容。

4- TextFileFilter.java类用作.txt文件过滤器。

5- LuceneTester.java lass用于测试lucene库的索引和搜索功能..

现在我尝试在Fielder.java中为字段位置（TermVectorPosition）编制索引，并通过LuceneTester.java中的查询检索它。任何人帮助我

Answer 1

    public void doSearch(String querystr) throws IOException, ParseException {      


   StandardAnalyzer analyzer = new StandardAnalyzer(Version.LUCENE_36);  

   Directory index = FSDirectory.open(new File(indexDir));  

   // 2. query  

   Query q = new QueryParser(Version.LUCENE_36, LuceneConstants.Term_Vector_Position, analyzer).parse(querystr);  


   // 3. search  
   int hitsPerPage = 10;  
   IndexSearcher searcher = new IndexSearcher(index, true);  
   IndexReader reader = IndexReader.open(index, true);  
   searcher.setDefaultFieldSortScoring(true, true);  
   TopScoreDocCollector collector = TopScoreDocCollector.create(hitsPerPage, true);  
   searcher.search(q, collector);  
   ScoreDoc[] hits = collector.topDocs().scoreDocs;  

   // 4. display term positions, and term indexes   
   System.out.println("Found " + hits.length + " hits.");  
 //  System.out.println("Found " + hits.clone().length+ " hits.");
   for(int i=0;i<hits.clone().length;++i) {  

       int docId = hits[i].doc;  
       System.out.println("docId:" + docId);
       TermFreqVector tfvector = reader.getTermFreqVector(docId, "TVP");  
       TermPositionVector tpvector = (TermPositionVector)tfvector; 
       System.out.println("tfvector " + tfvector + " tpvector" + tpvector);
       int termidx = tfvector.indexOf(querystr);  
       System.out.println("termidx " + termidx );
       int[] termposx = tpvector.getTermPositions(termidx);
       //System.out.println("termposx " + termposx.length);
       TermVectorOffsetInfo[] tvoffsetinfo = tpvector.getOffsets(termidx);

     for (int j=0;j<termposx.length;j++) {  
          System.out.println("termpos at j :"+j + ": " +termposx[j]);  
      } 

      System.out.println("tvoffsetinfo " + tvoffsetinfo.length);

      for (int j=0;j<tvoffsetinfo.length;j++) {  
          int offsetStart = tvoffsetinfo[j].getStartOffset();  
          int offsetEnd = tvoffsetinfo[j].getEndOffset();  
          System.out.println("offsets : "+offsetStart+" "+offsetEnd);  
      }  

      Document d = searcher.doc(docId);  
      System.out.println((i + 1) + ". " + d.get("filepath"));

   }

    // searcher can only be closed when there  
   // is no need to access the do***ents any more.   
   searcher.close();

}

在Lucene中如何索引文本文件的单词位置

1 个答案: