//定义存放索引的目录 。
         File   indexDir = new File("D:\\luceneIndex"); 
         //测试用法的一种，对目录中的txt文件的内容进行索引，供查询。 
         File   dataDir  = new File("D:\\luceneData");
         
         //确定分词的实现方法。这是Lucene自带的分词器
         //Analyzer writerAnalyzer = new SimpleAnalyzer(Version.LUCENE_33);
         //庖丁解牛  建立中文分词解析
         Analyzer writerAnalyzer = new PaodingAnalyzer();
         //
         IndexWriterConfig indexWriterConfig = new IndexWriterConfig(Version.LUCENE_33, writerAnalyzer);
         //设定是对索引增量，还是新建索引。
         indexWriterConfig.setOpenMode(OpenMode.CREATE);
         //索引写入流
         IndexWriter indexWriter = new IndexWriter(FSDirectory.open(indexDir),indexWriterConfig);
         
         File[] dataFiles  = dataDir.listFiles(); 
         long startTime = new Date().getTime(); 
         for(int i = 0; i < dataFiles.length; i++){ 
              if(dataFiles[i].isFile() && dataFiles[i].getName().endsWith(".txt")){
                   System.out.println("Indexing file " + dataFiles[i].getCanonicalPath()); 
                   Document document = new Document(); 
                   FileInputStream fileInputStream = new FileInputStream(dataFiles[i]);
                   InputStreamReader reader =   new   InputStreamReader(fileInputStream,"GBK");
                   
                   document.add(new Field("path",dataFiles[i].getCanonicalPath(),Field.Store.YES,Field.Index.ANALYZED));
                   document.add(new Field("filename",dataFiles[i].getName(),Field.Store.YES,Field.Index.ANALYZED,TermVector.WITH_POSITIONS_OFFSETS));
                   document.add(new Field("contents",reader,TermVector.WITH_POSITIONS_OFFSETS));
                   indexWriter.addDocument(document); 
              } 
         }
         //对IndexWriter进行优化
         indexWriter.optimize(); 
         indexWriter.close();