lucene搜索，你懂的！

using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 using Lucene.Net.Index;
 6 using Lucene.Net.Store;
 7 using Lucene.Net.Analysis.Standard;
 8 using Lucene.Net.Documents;
 9 using System.Data;
10 using System.Diagnostics;
11 using Lucene.Net.Search;
12 
13 using Lucene.Net.QueryParsers;
14 
15 namespace First
16 {
17     class Program
18     {
19         static string path = @"D:\Sample";
20 
21         static void Main(string[] args)
22         {
23             //创建索引
24             CreateIndex();
25 
26             var watch = Stopwatch.StartNew();
27 
28             //搜索
29             IndexSearcher search = new IndexSearcher(path);
30 
31             //查询表达式
32             QueryParser query = new QueryParser(string.Empty, new StandardAnalyzer());
33 
34             //query.parse：注入查询条件
35             var hits = search.Search(query.Parse("Content:流行"));
36 
37             for (int i = 0; i < hits.Length(); i++)
38             {
39                 Console.WriteLine("当前内容:{0}", hits.Doc(i).Get("Content").Substring(0, 20) + "...");
40             }
41 
42             watch.Stop();
43 
44             Console.WriteLine("搜索耗费时间:{0}", watch.ElapsedMilliseconds);
45         }
46 
47         static void CreateIndex()
48         {
49             //创建索引库目录
50             var directory = FSDirectory.GetDirectory(path, true);
51 
52             //创建一个索引,采用StandardAnalyzer对句子进行分词
53             IndexWriter indexWriter = new IndexWriter(directory, new StandardAnalyzer());
54 
55             var reader = DbHelperSQL.ExecuteReader("select * from News");
56 
57             while (reader.Read())
58             {
59                 //域的集合：文档，类似于表的行
60                 Document doc = new Document();
61 
62                 //要索引的字段
63                 doc.Add(new Field("ID", reader["ID"].ToString(), Field.Store.YES, Field.Index.NOT_ANALYZED));
64                 doc.Add(new Field("Title", reader["Title"].ToString(), Field.Store.NO, Field.Index.ANALYZED));
65                 doc.Add(new Field("Content", reader["Content"].ToString(), Field.Store.YES, Field.Index.ANALYZED));
66 
67                 indexWriter.AddDocument(doc);
68             }
69 
70             reader.Close();
71 
72             //对索引文件进行优化
73             indexWriter.Optimize();
74 
75             indexWriter.Close();
76         }
77     }
78 }
转载：http://www.cnblogs.com/huangxincheng/archive/2012/05/13/2497738.html