public static IEnumerable <VM.SearchModel> Search(string keyWord)
{
try
{
List <VM.SearchModel> result = new List <VM.SearchModel>();
Dictionary <string, string> dic = new Dictionary <string, string>();
/*加入时间统计*/
Stopwatch sw = new Stopwatch();
sw.Start();
/*创建 Lucene.net 搜索实例*/
string IndexDic = GetMapPath("~/SearchData/IndexData");
string PanGuXmlPath = GetMapPath("~/SearchData/PanGu/PanGu.xml");
PanGu.Segment.Init(PanGuXmlPath);
FSDirectory directory = FSDirectory.Open(new DirectoryInfo(IndexDic), new NoLockFactory());
IndexReader reader = IndexReader.Open(directory, true);
IndexSearcher searcher = new IndexSearcher(reader);
/*为搜索实例 加入搜索分词规则 来源 盘古分词*/
keyWord = GetKeyWordsSplitBySpace(keyWord, new PanGuTokenizer());
PhraseQuery query = new PhraseQuery();
if (!string.IsNullOrEmpty(keyWord))
{
dic.Add("Content", keyWord);
foreach (string word in keyWord.Split('/'))
{
if (word == "")
{
continue;
}
query.Add(new Term("Content", word));
}
}
query.Slop = 100;
TopScoreDocCollector collector = TopScoreDocCollector.Create(1024, true); //最大1024条记录
searcher.Search(query, null, collector);
int totalCount = collector.TotalHits; //返回总条数
ScoreDoc[] docs = collector.TopDocs(0, 10).ScoreDocs; //分页,下标应该从0开始吧，0是第一条记录
///*指定排序方式 按 PostScore 字段来排序*/
//List<SortField> sorts = new List<SortField>();
//SortField sf = new SortField("ID", SortField.INT, true);
//sorts.Add(sf);
//Sort sort = new Sort(sorts.ToArray());
//TopFieldDocs docs = searcher.Search(bq, null, searcher.MaxDoc, sort);
//int allCount = docs.TotalHits;
///*获取匹配的前10条*/
//ScoreDoc[] hits = TopDocs(0, 10, docs);
foreach (ScoreDoc sd in docs)//遍历搜索到的结果
{
try
{
Document doc = searcher.Doc(sd.Doc);
var model = new VM.SearchModel();
model.ID = int.Parse(doc.Get("ID"));
model.Title = doc.Get("Title");
model.Contents = doc.Get("Content");
//SetHighlighter(null, model);
result.Add(SetHighlighter(dic, model));
}
catch
{
}
}
searcher.Close();
searcher.Dispose();
sw.Stop();
return(result);
}
catch (Exception)
{
return(null);
}
}
private static VM.SearchModel SetHighlighter(Dictionary <string, string> dicKeywords, VM.SearchModel model)
{
PanGu.HighLight.SimpleHTMLFormatter simpleHTMLFormatter = new PanGu.HighLight.SimpleHTMLFormatter("<font color=\"red\">", "</font>");
PanGu.HighLight.Highlighter highlighter = new PanGu.HighLight.Highlighter(simpleHTMLFormatter, new Segment());
highlighter.FragmentSize = 100;
string strContent = string.Empty;
dicKeywords.TryGetValue("Content", out strContent);
if (!string.IsNullOrEmpty(strContent))
{
model.Contents = highlighter.GetBestFragment(strContent, model.Contents) + "...";
//model.Content = string.Join("...", (highlighter.GetFragments(strContent, model.Content,3).ToList()));
}
return(model);
}
