????????? 很早就知道Lucene.Net但一直都沒時間認真實踐一下.最近項目需要.所以考慮學(xué)習(xí)一下Lucene.Net引擎.終于做出了第一個Demo感覺挺實用的.還不錯.代碼貼上.各位博友可參考學(xué)習(xí)一下.

??????? protected void btnAddIndex_Click(object sender, EventArgs e)
??????? {
??????????? writer = new IndexWriter(Server.MapPath("index"), new Lucene.Net.Analysis.SimpleAnalyzer(), false);
??????????? IndexDirectory(writer, new FileInfo(Server.MapPath("doc")));
??????????? writer.Close();
??????? }
??????? public void IndexDirectory(IndexWriter writer, FileInfo file)
??????? {
??????????? if (System.IO.Directory.Exists(file.FullName))
??????????? {
??????????????? String[] files = System.IO.Directory.GetFileSystemEntries(file.FullName);
??????????????? if (files != null)
??????????????? {
??????????????????? for (int i = 0; i < files.Length; i++)
??????????????????? {
??????????????????????? IndexDirectory(writer, new FileInfo(files[i]));?
??????????????????? }
??????????????? }
??????????? }
??????????? else if (file.Extension == ".txt" || file.Extension == ".htm" || file.Extension == ".html")
??????????? {
??????????????? IndexFile(file, writer);
??????????? }
??????? }

??????? private void IndexFile(FileInfo file, IndexWriter writer)
??????? {
??????????? try
??????????? {
??????????????? Document doc = new Document();
??????????????? txtListIndex.Text = txtListIndex.Text + "\n文件路徑:" + file.FullName;
??????????????? doc.Add(Field.Keyword("filename", Path.GetFileName(file.FullName).Replace(file.Extension,"")));
??????????????? //doc.Add(Field.Text("contents", new StreamReader(file.FullName, System.Text.Encoding.Default)));
??????????????? doc.Add(Field.Text("contents", file.FullName));
??????????????? writer.AddDocument(doc);
??????????? }
??????????? catch (FileNotFoundException fnfe)
??????????? {
??????????????? Response.Write(fnfe.Message);
??????????? }
??????? }

??????? protected void Button1_Click(object sender, EventArgs e)
??????? {
??????????? IndexSearcher searcher = new IndexSearcher(Server.MapPath("index"));

??????????? Query query = QueryParser.Parse("Linux", "filename", new Lucene.Net.Analysis.WhitespaceAnalyzer());

??????????? Hits hits = searcher.Search(query);

??????????? if (hits.Length() > 0)
??????????? {
??????????????? for (int num = 0; num <= hits.Length() - 1; num++)
??????????????? {
??????????????????? Document docNew = hits.Doc(num);
??????????????????? txtListIndex.Text = txtListIndex.Text + "\n" + docNew.Get("contents");
??????????????? }
??????????? }
??????? }

轉(zhuǎn)載于:https://www.cnblogs.com/witer666/archive/2008/04/26/1172597.html

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