添加：2013-12-25

更新：2013-12-26 新增分页功能。

更新：2013-12-27 新增按分类查询功能，调整索引行新增记录的图片字段。

//封装类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using Lucene.Net.Analysis;
using Lucene.Net.Index;
using Lucene.Net.Documents;
using System.Reflection;
using Lucene.Net.QueryParsers;
using Lucene.Net.Search;
namespace SearchTest
{/// <summary>/// 盘古分词在lucene.net中的使用帮助类/// 调用PanGuLuceneHelper.instance/// </summary>public class PanGuLuceneHelper{private PanGuLuceneHelper() { }#region 单一实例private static PanGuLuceneHelper _instance = null;/// <summary>/// 单一实例/// </summary>public static PanGuLuceneHelper instance{get{if (_instance == null) _instance = new PanGuLuceneHelper();return _instance;}}#endregion#region 分词测试/// <summary>/// 分词测试/// </summary>/// <param name="keyword"></param>/// <returns></returns>public string Token(string keyword){string ret = "";System.IO.StringReader reader = new System.IO.StringReader(keyword);Lucene.Net.Analysis.TokenStream ts = analyzer.TokenStream(keyword, reader);bool hasNext = ts.IncrementToken();Lucene.Net.Analysis.Tokenattributes.ITermAttribute ita;while (hasNext){ita = ts.GetAttribute<Lucene.Net.Analysis.Tokenattributes.ITermAttribute>();ret += ita.Term + "|";hasNext = ts.IncrementToken();}ts.CloneAttributes();reader.Close();analyzer.Close();return ret;}#endregion#region 创建索引/// <summary>/// 创建索引/// </summary>/// <param name="datalist"></param>/// <returns></returns>public bool CreateIndex(List<MySearchUnit> datalist){IndexWriter writer = null;try{writer = new IndexWriter(directory_luce, analyzer, false, IndexWriter.MaxFieldLength.LIMITED);//false表示追加（true表示删除之前的重新写入）}catch{writer = new IndexWriter(directory_luce, analyzer, true, IndexWriter.MaxFieldLength.LIMITED);//false表示追加（true表示删除之前的重新写入）}foreach (MySearchUnit data in datalist){CreateIndex(writer, data);}writer.Optimize();writer.Dispose();return true;}public bool CreateIndex(IndexWriter writer, MySearchUnit data){try{if (data == null) return false;Document doc = new Document();Type type = data.GetType();//assembly.GetType("Reflect_test.PurchaseOrderHeadManageModel", true, true); //命名空间名称 + 类名    //创建类的实例    //object obj = Activator.CreateInstance(type, true);  //获取公共属性    PropertyInfo[] Propertys = type.GetProperties();for (int i = 0; i < Propertys.Length; i++){//Propertys[i].SetValue(Propertys[i], i, null); //设置值PropertyInfo pi = Propertys[i];string name=pi.Name;object objval = pi.GetValue(data, null);string value = objval == null ? "" : objval.ToString(); //值if (name == "id" || name=="flag" )//id在写入索引时必是不分词，否则是模糊搜索和删除，会出现混乱{doc.Add(new Field(name, value, Field.Store.YES, Field.Index.NOT_ANALYZED));//id不分词}else{doc.Add(new Field(name, value, Field.Store.YES, Field.Index.ANALYZED));}}writer.AddDocument(doc);}catch (System.IO.FileNotFoundException fnfe){throw fnfe;}return true;}#endregion#region 在title和content字段中查询数据/// <summary>/// 在title和content字段中查询数据/// </summary>/// <param name="keyword"></param>/// <returns></returns>public List<MySearchUnit> Search(string keyword){string[] fileds = { "title", "content" };//查询字段//Stopwatch st = new Stopwatch();//st.Start();QueryParser parser = null;// new QueryParser(Lucene.Net.Util.Version.LUCENE_30, field, analyzer);//一个字段查询parser = new MultiFieldQueryParser(version, fileds, analyzer);//多个字段查询Query query = parser.Parse(keyword);int n = 1000;IndexSearcher searcher = new IndexSearcher(directory_luce, true);//true-表示只读TopDocs docs = searcher.Search(query, (Filter)null, n);if (docs == null || docs.TotalHits == 0){return null;}else{List<MySearchUnit> list = new List<MySearchUnit>();int counter = 1;foreach (ScoreDoc sd in docs.ScoreDocs)//遍历搜索到的结果{try{Document doc = searcher.Doc(sd.Doc);string id = doc.Get("id");string title = doc.Get("title");string content = doc.Get("content");string flag = doc.Get("flag");string imageurl = doc.Get("imageurl");string updatetime = doc.Get("updatetime");string createdate = doc.Get("createdate");PanGu.HighLight.SimpleHTMLFormatter simpleHTMLFormatter = new PanGu.HighLight.SimpleHTMLFormatter("<font color=\"red\">", "</font>");PanGu.HighLight.Highlighter highlighter = new PanGu.HighLight.Highlighter(simpleHTMLFormatter, new PanGu.Segment());highlighter.FragmentSize = 50;content = highlighter.GetBestFragment(keyword, content);string titlehighlight = highlighter.GetBestFragment(keyword, title);if (titlehighlight != "") title = titlehighlight;list.Add(new MySearchUnit(id, title, content, flag,imageurl, updatetime));}catch (Exception ex){Console.WriteLine(ex.Message);}counter++;}return list;}//st.Stop();//Response.Write("查询时间：" + st.ElapsedMilliseconds + " 毫秒<br/>");}#endregion#region 在不同的分类下再根据title和content字段中查询数据(分页)/// <summary>/// 在不同的类型下再根据title和content字段中查询数据(分页)/// </summary>/// <param name="_flag">分类,传空值查询全部</param>/// <param name="keyword"></param>/// <param name="PageIndex"></param>/// <param name="PageSize"></param>/// <param name="TotalCount"></param>/// <returns></returns>public List<MySearchUnit> Search(string _flag,string keyword, int PageIndex, int PageSize, out int TotalCount){if (PageIndex < 1) PageIndex = 1;//Stopwatch st = new Stopwatch();//st.Start();BooleanQuery bq = new BooleanQuery();if (_flag != ""){QueryParser qpflag = new QueryParser(version, "flag", analyzer);Query qflag = qpflag.Parse(_flag);bq.Add(qflag, Occur.MUST);//与运算}if (keyword != ""){string[] fileds = { "title", "content" };//查询字段QueryParser parser = null;// new QueryParser(version, field, analyzer);//一个字段查询parser = new MultiFieldQueryParser(version, fileds, analyzer);//多个字段查询Query queryKeyword = parser.Parse(keyword);bq.Add(queryKeyword, Occur.MUST);//与运算}TopScoreDocCollector collector = TopScoreDocCollector.Create(PageIndex * PageSize, false);IndexSearcher searcher = new IndexSearcher(directory_luce, true);//true-表示只读searcher.Search(bq, collector);if (collector == null || collector.TotalHits == 0){TotalCount = 0;return null;}else{int start = PageSize * (PageIndex - 1);//结束数int limit = PageSize;ScoreDoc[] hits = collector.TopDocs(start, limit).ScoreDocs;List<MySearchUnit> list = new List<MySearchUnit>();int counter = 1;TotalCount = collector.TotalHits;foreach (ScoreDoc sd in hits)//遍历搜索到的结果{try{Document doc = searcher.Doc(sd.Doc);string id = doc.Get("id");string title = doc.Get("title");string content = doc.Get("content");string flag = doc.Get("flag");string imageurl = doc.Get("imageurl");string updatetime = doc.Get("updatetime");PanGu.HighLight.SimpleHTMLFormatter simpleHTMLFormatter = new PanGu.HighLight.SimpleHTMLFormatter("<font color=\"red\">", "</font>");PanGu.HighLight.Highlighter highlighter = new PanGu.HighLight.Highlighter(simpleHTMLFormatter, new PanGu.Segment());highlighter.FragmentSize = 50;content = highlighter.GetBestFragment(keyword, content);string titlehighlight = highlighter.GetBestFragment(keyword, title);if (titlehighlight != "") title = titlehighlight;list.Add(new MySearchUnit(id, title, content, flag,imageurl, updatetime));}catch (Exception ex){Console.WriteLine(ex.Message);}counter++;}return list;}//st.Stop();//Response.Write("查询时间：" + st.ElapsedMilliseconds + " 毫秒<br/>");}#endregion#region 删除索引数据（根据id）/// <summary>/// 删除索引数据（根据id）/// </summary>/// <param name="id"></param>/// <returns></returns>public bool Delete(string id){bool IsSuccess = false;Term term = new Term("id", id);//Analyzer analyzer = new StandardAnalyzer(Lucene.Net.Util.Version.LUCENE_30);//Version version = new Version();//MultiFieldQueryParser parser = new MultiFieldQueryParser(version, new string[] { "name", "job" }, analyzer);//多个字段查询//Query query = parser.Parse("小王");//IndexReader reader = IndexReader.Open(directory_luce, false);//reader.DeleteDocuments(term);//Response.Write("删除记录结果： " + reader.HasDeletions + "<br/>");//reader.Dispose();IndexWriter writer = new IndexWriter(directory_luce, analyzer, false, IndexWriter.MaxFieldLength.LIMITED);writer.DeleteDocuments(term); // writer.DeleteDocuments(term)或者writer.DeleteDocuments(query);writer.DeleteAll();writer.Commit();//writer.Optimize();//IsSuccess = writer.HasDeletions();writer.Dispose();return IsSuccess;}#endregion#region 删除全部索引数据/// <summary>/// 删除全部索引数据/// </summary>/// <returns></returns>public bool DeleteAll(){bool IsSuccess = true;try{IndexWriter writer = new IndexWriter(directory_luce, analyzer, false, IndexWriter.MaxFieldLength.LIMITED);writer.DeleteAll();writer.Commit();//writer.Optimize();//IsSuccess = writer.HasDeletions();writer.Dispose();}catch{IsSuccess = false;}return IsSuccess;}#endregion#region directory_luceprivate Lucene.Net.Store.Directory _directory_luce = null;/// <summary>/// Lucene.Net的目录-参数/// </summary>public Lucene.Net.Store.Directory directory_luce{get{if (_directory_luce == null) _directory_luce = Lucene.Net.Store.FSDirectory.Open(directory);return _directory_luce;}} #endregion#region directoryprivate System.IO.DirectoryInfo _directory = null;/// <summary>/// 索引在硬盘上的目录/// </summary>public System.IO.DirectoryInfo directory{get{if (_directory == null){string dirPath = AppDomain.CurrentDomain.BaseDirectory + "SearchIndex";if (System.IO.Directory.Exists(dirPath) == false) _directory = System.IO.Directory.CreateDirectory(dirPath);else _directory = new System.IO.DirectoryInfo(dirPath);}return _directory;}} #endregion#region analyzerprivate Analyzer _analyzer = null;/// <summary>/// 分析器/// </summary>public Analyzer analyzer{get{//if (_analyzer == null){_analyzer = new Lucene.Net.Analysis.PanGu.PanGuAnalyzer();//盘古分词分析器//_analyzer = new StandardAnalyzer(Lucene.Net.Util.Version.LUCENE_30);//标准分析器}return _analyzer;}} #endregion#region versionprivate static Lucene.Net.Util.Version _version = Lucene.Net.Util.Version.LUCENE_30;/// <summary>/// 版本号枚举类/// </summary>public Lucene.Net.Util.Version version{get{return _version;}}#endregion}#region 索引的一个行单元，相当于数据库中的一行数据/// <summary>/// 索引的一个行单元，相当于数据库中的一行数据/// </summary>public class MySearchUnit{public MySearchUnit(string _id, string _title, string _content, string _flag, string _imageurl, string _updatetime){this.id = _id;this.title = _title;this.content = _content;this.flag = _flag;this.imageurl = _imageurl;this.updatetime = _updatetime;}/// <summary>/// 唯一的id号/// </summary>public string id { get; set; }/// <summary>/// 标题/// </summary>public string title { get; set; }/// <summary>/// 内容/// </summary>public string content { get; set; }/// <summary>/// 其他信息/// </summary>public string flag { get; set; }/// <summary>/// 图片路径/// </summary>public string imageurl { get; set; }/// <summary>/// 时间/// </summary>public string updatetime { get; set; }} #endregion
}

//调用测试

       protected void Page_Load(object sender, EventArgs e){//PanGuLuceneHelper.instance.DeleteAll();//删除全部//PanGuLuceneHelper.instance.Delete("1d");//根据id删除bool exec = false;if (exec){List<MySearchUnit> list = new List<MySearchUnit>();list.Add(new MySearchUnit("1a", "标题小王", "今天是小王的生日，大家都很高兴去他家喝酒，玩了一整天。", new Random().Next(1, 10).ToString(), "", ""));list.Add(new MySearchUnit("1b", "标题小张", "今天是小张的生日，大家都很高兴去他家喝酒，玩了几天。", new Random().Next(1, 10).ToString(), "", ""));list.Add(new MySearchUnit("1c", "标题小王", "今天是小王的生日，大家都很高兴去他家喝酒，玩了一整天。", new Random().Next(1, 10).ToString(), "", ""));list.Add(new MySearchUnit("1d", "标题小张", "今天是小张的生日，大家都很高兴去他家喝酒，玩了几天。", new Random().Next(1, 10).ToString(), "", ""));PanGuLuceneHelper.instance.CreateIndex(list);//添加索引}int count = 0;int PageIndex=2;int PageSize=4;string html_content = "";List<MySearchUnit> searchlist = PanGuLuceneHelper.instance.Search("3","小王 生日",PageIndex,PageSize,out count);html_content+=("查询结果：" + count + "条数据<br/>");if (searchlist == null || searchlist.Count==0){html_content += ("未查询到数据。<br/>");}else{foreach (MySearchUnit data in searchlist){html_content += (string.Format("id：{0},title：{1},content：{2},flag：{3},updatetime：{4}<br/>", data.id, data.title, data.content, data.flag, data.updatetime));}}html_content += (PanGuLuceneHelper.instance.version);div_content.InnerHtml = html_content;}

//效果：

第一版源码示例下载：http://download.csdn.net/detail/pukuimin1226/6768179

最新源码示例下载：http://download.csdn.net/detail/pukuimin1226/6776049

百度云盘下载链接：http://pan.baidu.com/s/1o69cCD8

Lucene.Net没有判断数据重复性，同一条数据插入多少遍它就有多少条相同的数据，所以，我们人为地用id区分，在数据量大，全部重新创建索引时间长的情况下（数据量到几万以上就耗资源了，从数据库中查询出来，再写入索引，使得数据库和程序本身都增加负担），增量建立索引是很有必要的。

新增一条数据，就直接添加一条索引；

修改一条数据，先删除同一个id的索引（不管有多少个id相同的，都会一次性删除），再添加一条。

数据库中的id建议大家都用guid去掉“-”，还可以加日期“yyyyMMddHHmmss”这样组合，长度一致看起来美观，也充分保证唯一。