using Lucene.Net.Search;

 using Lucene.Net.Store;

 using Lucene.Net.QueryParsers;

 using Lucene.Net.Documents;

 using Lucene.Net.Index;

 using Lucene.Net.Analysis.Standard;

 using Lucene.Net.Analysis;

 using Lucene.Net.Analysis.PanGu;

 using PanGu.HighLight;

 using PanGu;

 static string path = @"G:\indextest";//索引文件储存位置

 static void CreateIndex()

         {

             //创建索引库目录

             var directory = FSDirectory.Open(new DirectoryInfo(path));

             Analyzer analyzer = null;

             //analyzer = new StandardAnalyzer(Lucene.Net.Util.Version.LUCENE_29);

             if (isPangu)

             {

                 analyzer = new PanGuAnalyzer();//盘古Analyzer

             }

             else

             {

                 analyzer = new StandardAnalyzer(Lucene.Net.Util.Version.LUCENE_29);

             }

             //创建一个索引,采用StandardAnalyzer对句子进行分词

             IndexWriter indexWriter = new IndexWriter(directory, analyzer, true, IndexWriter.MaxFieldLength.LIMITED);

             MySqlConnection conn = new MySqlConnection(@"server=localhost;User Id=root;password=123456;Database=ecshop");

             conn.Open();

             MySqlCommand cmd = new MySqlCommand("select goods_name,goods_brief from ecs_goods", conn);

             MySqlDataReader reader = cmd.ExecuteReader();

             while (reader.Read())

             {

                 //域的集合：文档，类似于表的行

                 Document doc = new Document();

                 //要索引的字段

                 doc.Add(new Field("goods_name", reader["goods_name"].ToString(), Field.Store.YES, Field.Index.ANALYZED));

                 doc.Add(new Field("goods_brief", reader["goods_brief"].ToString(), Field.Store.YES, Field.Index.ANALYZED));

                 indexWriter.AddDocument(doc);

             }

             reader.Close();

             //对索引文件进行优化

             indexWriter.Optimize();

             indexWriter.Close();

         }

 　　　　 protected void Page_Load(object sender, EventArgs e)

         {

             keyword = Request.Form["q"];

             if (keyword != null && keyword != "")

             {

                 var watch = Stopwatch.StartNew();

                 Analyzer analyzer = null;

                 analyzer = new StandardAnalyzer(Lucene.Net.Util.Version.LUCENE_29);

                 //搜索

                 IndexSearcher searcher = new IndexSearcher(FSDirectory.Open(new DirectoryInfo(path)), true);

                 //查询表达式

                 QueryParser queryP = new QueryParser(Lucene.Net.Util.Version.LUCENE_29, "goods_name", analyzer);

                 //query.parse：注入查询条件

                 Query query = queryP.Parse(keyword);

                 var hits = searcher.Search(query, );

                 //create highlighter

                 //IFormatter formatter = new SimpleHTMLFormatter("<span style=\"font-weight:bold;color: red;\">", "</span>");

                 //SimpleFragmenter fragmenter = new SimpleFragmenter(80);

                 //var scorer = new QueryScorer(query);

                 //Highlighter highlighter = new Highlighter(formatter, scorer);

                 //highlighter.TextFragmenter = fragmenter;

                 //PanGu create highlighter

                 PanGu.HighLight.SimpleHTMLFormatter simpleHTMLFormatter =

                    new PanGu.HighLight.SimpleHTMLFormatter("<span style=\"font-weight:bold;color: red;\">", "</span>");

                 PanGu.HighLight.Highlighter highlighter =

                     new PanGu.HighLight.Highlighter(simpleHTMLFormatter,

                     new Segment());

                 highlighter.FragmentSize = ;

                 for (int i = ; i < hits.totalHits; i++)

                 {

                     Document doc = searcher.Doc(hits.scoreDocs[i].doc);

                     //TokenStream stream = analyzer.TokenStream("goods_name", new StringReader(doc.Get("goods_name")));

                     //String sample = highlighter.GetBestFragments(stream, doc.Get("goods_name"), 2, "...");

                     goods g = new goods();

                     g.goods_name = highlighter.GetBestFragment(keyword, doc.Get("goods_name"));

                     g.goods_brief = highlighter.GetBestFragment(keyword, doc.Get("goods_brief"));

                     gs.Add(g);

                 }

                 watch.Stop();

                 tasktime = "搜索耗费时间:" + watch.ElapsedMilliseconds + "毫秒";

             }

         }

  string[] fields = { "Title", "Content" };

                 MultiFieldQueryParser mq = new MultiFieldQueryParser(Lucene.Net.Util.Version.LUCENE_29, fields, analyzer);

                 Query multiquery = mq.Parse(keyword);// MultiFieldQueryParser.Parse(Lucene.Net.Util.Version.LUCENE_29, new string[] { keyword }, fields, analyzer);

                 var hits1 = searcher.Search(multiquery, );