sulin LuceneNet 搜索二

1.添加引用dll

using Lucene.Net.Search;
using Lucene.Net.Analysis.PanGu;
using PanGu;
using PanGu.HighLight;
using Lucene.Net.Documents;
using Lucene.Net.Store;
using Lucene.Net.Index;
using Lucene.Net.QueryParsers;

2.查询代码

  /// <summary>
         /// 从索引搜索结果
         /// </summary>
         private void SearchIndex()
         {
             Dictionary<string, string> dic = new Dictionary<string, string>();
             BooleanQuery bQuery = new BooleanQuery();
             CachingWrapperFilter filter = null;
             TermQuery query2 = null;
             string title = string.Empty;
             string content = string.Empty;
             if ((Request["title"] != null && Request["title"].ToString() != "") || !string.IsNullOrEmpty(txtTitle))
             {
                 string searchkey = Request["title"]==null?"":Request["title"].ToString();
                 if(!string.IsNullOrEmpty(txtTitle)){
                     searchkey=txtTitle;
                 }
                 foreach (string word in GetKeyWordsSplitBySpace(searchkey))
                 {
                     query2 = new TermQuery(new Term("Title", word));
                     bQuery.Add(query2, BooleanClause.Occur.SHOULD);//这里设置 条件为Or关系
                     query2 = new TermQuery(new Term("SimpleDesc", word));
                     bQuery.Add(query2, BooleanClause.Occur.SHOULD);//这里设置 条件为Or关系
                     query2 = new TermQuery(new Term("Tags", word));
                     bQuery.Add(query2, BooleanClause.Occur.SHOULD);//这里设置 条件为Or关系
                     //query2 = new TermQuery(new Term("ContextDesc", word));
                     //bQuery.Add(query2, BooleanClause.Occur.SHOULD);//这里设置 条件为Or关系
                 }
                 dic.Add("Title", searchkey);
                 dic.Add("SimpleDesc", searchkey);
                 txtTitle = searchkey;

                 if(this.hfradchecked.Value!="全部"){
                     //TermQuery query1 = new TermQuery(new Term("Types", this.hfradchecked.Value));
                     txttype = this.hfradchecked.Value;
                     query2 = new TermQuery(new Term("Types", this.hfradchecked.Value.ToString()));
                     QueryWrapperFilter oldFilter = new QueryWrapperFilter(query2);
                     filter = new CachingWrapperFilter(oldFilter);

                 }
                 if (bQuery != null && bQuery.GetClauses().Length > )
                 {
                     GetSearchResult(bQuery, dic, filter);
                 }
             }

         }
         /// <summary>
         /// 获取
         /// </summary>
         /// <param name="bQuery"></param>
         private void GetSearchResult(BooleanQuery bQuery, Dictionary<string, string> dicKeywords, CachingWrapperFilter filter)
         {
             try
             {
                 //IndexSearcher search = new IndexSearcher(IndexDic, true);
                 FSDirectory directory = FSDirectory.Open(new DirectoryInfo(IndexDic), new NoLockFactory());
                 IndexReader reader = IndexReader.Open(directory, true);
                 //IndexSearcher是进行搜索的类
                 IndexSearcher search = new IndexSearcher(reader);
                 Stopwatch stopwatch = Stopwatch.StartNew();
                 //SortField构造函数第三个字段true为降序,false为升序
                 Sort sort = new Sort(new SortField("UploadTime", SortField.DOC, true));
                 TopDocs docs = search.Search(bQuery, filter, PageSize * PageIndex, sort);
                 stopwatch.Stop();
                 if (docs != null && docs.totalHits > )
                 {
                     lSearchTime = stopwatch.ElapsedMilliseconds;
                     txtPageFoot = GetPageFoot(PageIndex, PageSize, docs.totalHits, "sabrosus");
                     for (int i = ; i < docs.totalHits; i++)
                     {
                         if (i >= (PageIndex - ) * PageSize && i < PageIndex * PageSize)
                         {
                             Document doc = search.Doc(docs.scoreDocs[i].doc);
                             ResourcesModel model = new ResourcesModel()
                             {
                                 ID = doc.Get("ID").ToString(),
                                 Title = doc.Get("Title").ToString(),
                                 Tags = doc.Get("Tags").ToString(),
                                 CreaetBy = doc.Get("CreaetBy").ToString(),
                                 UploadTime = doc.Get("UploadTime").ToString(),
                                 Types = doc.Get("Types").ToString(),
                                 SimpleDesc = doc.Get("SimpleDesc").ToString(),
                                 ContextDesc = doc.Get("ContextDesc").ToString()
                             };
                             list.Add(SetHighlighter(dicKeywords, model));
                         }
                     }
                 }
             }
             catch (Exception ex)
             {
                 LogHelper.SaveLogError("",ex.ToString());

             }

         }

         /// <summary>
         /// 处理关键字为索引格式
         /// </summary>
         /// <param name="keywords"></param>
         /// <returns></returns>
         private string[] GetKeyWordsSplitBySpace(string keywords)
         {
             PanGuTokenizer ktTokenizer = new PanGuTokenizer();
             StringBuilder result = new StringBuilder();
             List<string> listarry = new List<string>();
             ICollection<WordInfo> words = ktTokenizer.SegmentToWordInfos(keywords);

             foreach (WordInfo word in words)
             {
                 if (word == null)
                 {
                     continue;
                 }
                 listarry.Add(word.Word);
             }
             return listarry.ToArray();
         }

         /// <summary>
         /// 设置关键字高亮
         /// </summary>
         /// <param name="dicKeywords">关键字列表</param>
         /// <param name="model">返回的数据模型</param>
         /// <returns></returns>
         private ResourcesModel SetHighlighter(Dictionary<string, string> dicKeywords, ResourcesModel model)
         {
             SimpleHTMLFormatter simpleHTMLFormatter = new PanGu.HighLight.SimpleHTMLFormatter("<font color=\"red\">", "</font>");
             Highlighter highlighter = new PanGu.HighLight.Highlighter(simpleHTMLFormatter, new Segment());
             highlighter.FragmentSize = ;
             string strTitle = string.Empty;
             string strContent = string.Empty;
             string Title = model.Title;
             string SimpleDesc = model.SimpleDesc;
             dicKeywords.TryGetValue("Title", out strTitle);
             dicKeywords.TryGetValue("SimpleDesc", out strContent);

             if (!string.IsNullOrEmpty(strTitle))
             {
                 model.Title = highlighter.GetBestFragment(strTitle, model.Title);
                 if (model.Title == "" || model.Title==null)
                 {
                     model.Title = Title;
                 }
             }

             if (!string.IsNullOrEmpty(strContent))
             {
                 model.SimpleDesc = highlighter.GetBestFragment(strContent, model.SimpleDesc);
                 if (model.SimpleDesc == "" || model.SimpleDesc == null)
                 {
                     model.SimpleDesc = SimpleDesc;
                 }
                 model.SimpleDesc = GetContextSubstring(model.SimpleDesc, );
             }
             return model;
         }