初试 Lucene

1、首先要建立索引目录
2、建立索引
//先判断索引路径是否存在，不存在就建立
        File indexDir = new File(Constant.INDEXDIR);
        if(!indexDir.exists() && indexDir.isDirectory())
        {
            indexDir.mkdirs();
        }
        //创建 建立 indexWriter 的参数  directory indexWriterConf
       
        Directory directory = null;
        IndexWriterConfig indexWriterConfig = new IndexWriterConfig(Version.LUCENE_34, analyzer);
        IndexWriter indexWriter = null;
       
        try
        {
            directory = FSDirectory.open(indexDir);
            indexWriter = new IndexWriter(directory, indexWriterConfig);
        }
        catch (IOException e1)
        {
            e1.printStackTrace();
        }
       
        //将穿件来的值放到索引文件中  document 文件 filed 字段
        Document document = new Document();
        document.add(new Field("id",index.getId().trim(),Field.Store.YES, Field.Index.ANALYZED,Field.TermVector.WITH_POSITIONS_OFFSETS));
        document.add(new Field("name",index.getName().trim(),Field.Store.YES, Field.Index.ANALYZED, Field.TermVector.WITH_POSITIONS_OFFSETS));
        document.add(new Field("createTime",index.getCreateTime().trim(),Field.Store.YES,Field.Index.ANALYZED,Field.TermVector.WITH_POSITIONS_OFFSETS));
        try
        {  
            indexWriter.addDocument(document);
            indexWriter.optimize();
            indexWriter.close();
        }
        catch (CorruptIndexException e)
        {
            e.printStackTrace();
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }
3、修改索引 （一下代码中修改索引是按照 id 来修改如果id 存在修改该条记录。如果id 不存在添加该条记录）