lucene series 2 document 文檔 索引創建 api 簡介

 IndexWriter writer = getWriter();
  Document doc = new Document(); 
  doc.add(new Field("id", "1",
                    Field.Store.YES,
                    Field.Index.NOT_ANALYZED));
  doc.add(new Field("country", "Netherlands",
                    Field.Store.YES,
                    Field.Index.NO));
  doc.add(new Field("contents",                    
                    "Den Haag has a lot of museums",
                    Field.Store.NO,
                    Field.Index.ANALYZED));
  doc.add(new Field("city", "Den Haag",
                    Field.Store.YES,
                    Field.Index.ANALYZED));
  writer.close();

上篇文章說了一下創建索引的過程。現在介紹一下 lucene 創建索引的api吧

Document     A document is Lucene’s atomic  unit of indexing and searching. It’s a container that
holds one or more fields (lucene in action）有這麼一句話。可見document的重要性

Field  document 中包含的信息

IndexWriter  io操作，負責把信息 寫入指定的地點

這幾個對象   很像jdk io 中的                     

 OutStream  ===> IndexWriter// 操作者

File                 ====>document //容器

byte[]             =====>filed   //內容