l u c e n e 创 建 修 改 删 除 索 引

using System;
using System.Collections.Generic;
using System.Text;
using Business;
using Lucene.Net.Index;
using Lucene.Net.Documents;
using Lucene.Net.Analysis;
using Lucene.Net.Analysis.PanGu;
using Lucene.Net.Search;
using Lucene.Net.Store;

namespace Index
{
     class Program
    {
         private   static  string path =  @" D:\Work\HotelIndex ";
         static  void Main( string[] args)
        {
            CreateIndex();

            Search();
            Update();
            Search();
            Delete();
            Search();


            Console.Read();
        }
         private  static  void Update()
        {
            IndexWriter writer =  new IndexWriter(path,  new PanGuAnalyzer());
            Term term =  new Term( " keyid ",  " 3 ");
             // Term term = new Term("datapart", "sd");
             string title =  " datapartxiu酒店酒店 ";
            writer.UpdateDocument(term, CreateDataEntityIndex(title));
            writer.Commit();
             // writer.Optimize();
            writer.Close();
        }
         private  static  void Delete()
        { 
            IndexReader reader = IndexReader.Open(FSDirectory.Open( new System.IO.FileInfo(path)),  false);
 
             // Term term = new Term("keyid", "196");
            Term term =  new Term( " keyid ",  " 3 "); 
            reader.DeleteDocuments(term);
            reader.Commit(); 
            reader.Close();
        }
         private  static  void Search()
        {
            TopScoreDocCollector collector = TopScoreDocCollector.create( 10,  false);
            IndexSearcher searcher =  new IndexSearcher(path );
            BooleanQuery booleanQuery =  new BooleanQuery(); 
            BooleanQuery keyQuery =  new BooleanQuery();
            keyQuery.Add( new TermQuery( new Term( " title ",  " 酒店 ")), BooleanClause.Occur.SHOULD);
            booleanQuery.Add(keyQuery, BooleanClause.Occur.MUST);
            Query query = booleanQuery; 
            searcher.Search(query,  null, collector);
            ScoreDoc[] scoreDocArr = collector.TopDocs( 0,  10).scoreDocs;
             for ( int i =  0; i < scoreDocArr.Length; i++)
            {
                ScoreDoc scoreDoc = scoreDocArr[i];
                 int docId = scoreDoc.doc; // 拿到搜到的文档ID

                Document doc = searcher.Doc(docId); // 根据文档ID创建DOCUMENT 
                  string id = doc.Get( " keyid ").ToString();
                  string title = doc.Get( " title ").ToString();
                 Console.WriteLine( " id:  " + id +  "    title:  " + title);
            }
            searcher.Close();
            Console.WriteLine( " ------------------------------ ");
        }
         private  static  void CreateIndex()
        {
            IndexWriter writer =  new IndexWriter(path,  new PanGuAnalyzer());
             string title =  " 希尔顿酒店s ";
            Document doc = CreateDataEntityIndex(title, " 2 ");
            writer.AddDocument(doc);

            doc = CreateDataEntityIndex(title, " 3 ");
            writer.AddDocument(doc);

            writer.Close();
        }
         private  static Document CreateDataEntityIndex( string title, string keyid= " 1 ")
        {
            Field field;
            Document doc =  new Document();
            field =  new Field( " title ", title, Field.Store.YES, Field.Index.TOKENIZED); // 存储， 索引 
            doc.Add(field);
            field =  new Field( " data ", " sss ", Field.Store.NO, Field.Index.TOKENIZED); // 不存储( 不能在搜索结果中用doc.get("data").toString() 读取 )， 索引
             // field.SetBoost(dataEntity.Content.EntityBoost ); 
            doc.Add(field);
            field =  new Field( " datapart ",  " sd ", Field.Store.YES, Field.Index.UN_TOKENIZED); // 存储，不索引
             // field.SetBoost(dataEntity.Content.EntityBoost ); 
            doc.Add(field);
            field =  new Field( " mainurl ",   " sd ",  Field.Store.YES, Field.Index.UN_TOKENIZED);
            doc.Add(field);
             // field = new Field("districtid", "12112", Field.Store.YES, Field.Index.UN_TOKENIZED);
             // doc.Add(field);
            field =  new Field( " keyid ", keyid, Field.Store.YES, Field.Index.UN_TOKENIZED);
            doc.Add(field);
            field =  new Field( " ctripscore ",  " 1 ", Field.Store.YES, Field.Index.UN_TOKENIZED);
            doc.Add(field);
            field =  new Field( " districtname ",  " 1 ", Field.Store.YES, Field.Index.UN_TOKENIZED);
            doc.Add(field);
            field =  new Field( " datatype ",  " 1 ", Field.Store.YES, Field.Index.UN_TOKENIZED);
            doc.Add(field);
            field =  new Field( " districtpath ",  " 1 ", Field.Store.YES, Field.Index.UN_TOKENIZED);
            doc.Add(field);
             // double boost = double.Parse(dataEntity.CtripScore) + 1;
             // boost = Math.Sqrt(boost);
             // field = new Field("ctripscore", boost.ToString(), Field.Store.YES, Field.Index.TOKENIZED);
             // doc.Add(field);
             // doc.SetBoost(float.Parse(boost.ToString())); // 提高其中一条数据的权重，如广告 
             return doc;
        }
    }
}