瞎折腾之 Lucene.Net + MVC 搜索功能（上）
前言
首先，关于Lucene.Net 的文章已经很多了。我这次决定写出来只是为了练练手，虽然在别人看来没什么用，但是自己确实是手动实践了一把。我个人觉得还是有意义的。爱折腾、敢于实践、才能有所收获，才能发现问题。不要怕自己写的东西有问题，有问题才更好呢，可以让更多的人看见，提意见的当然是好，鄙视的……我也接受，给自己 动力去思考。
想让自己时刻保持着这种程序员-->代码心态、人都是带有惰性的，一旦玩起来 呵呵...
效果显示
进入主题
相信大家对于LuceneNet 并不陌生了，园子里面的文章很多。
参考文章：
http://www.cnblogs.com/birdshover/category/152283.html
http://www.cnblogs.com/psforever/archive/2011/10/06/2200019.html
界面是一个在线工具自己手动构的，可以随意的设计自己想要的界面。但是引用的css居然不是Bootstrap的css，这点得注意。
css样式引用地址：http://www.bootcss.com/p/layoutit/css/bootstrap-combined.min.css
http://www.bootcss.com/p/layoutit/css/layoutit.css
在线工具地址：http://www.bootcss.com/p/layoutit/
数据库大概8w条记录，每次最多取出1W条查询结果。正常人也不会看完这么多的。
核心代码
方法
/// <summary> /// 获得搜索列表 /// </summary> /// <param name="keyword">关键字</param> /// <param name="pageSize"></param> /// <param name="currentPage">当前页码</param> /// <param name="count"></param> /// <param name="pageCount"></param> /// <param name="isLike">是否开启模糊查询</param> /// <returns></returns> public static List<StoreInfo> GetSearchList(string keyword, int pageSize, int currentPage, out int count, out int pageCount, bool isLike = false) { string keywords = keyword; //获取用户输入关键字，以备设置高亮显示 string strIndexPath = INDEX_STORE_PATH; List<StoreInfo> storeList = new List<StoreInfo>(); StoreInfo modelstore; pageCount = 0; count = 0; IndexSearcher search = null; try { search = new IndexSearcher(FSDirectory.Open(new System.IO.DirectoryInfo(strIndexPath)), true); } catch (Exception) { return null; } keyword = GetKeyWordsSplitBySpace(keyword, new PanGuTokenizer()); QueryParser titleQueryParser = new QueryParser(Lucene.Net.Util.Version.LUCENE_29, "body", new PanGuAnalyzer(true)); Query titleQuery = titleQueryParser.Parse(keyword); Query PrefixQuery_title = null; Query PrefixQuery_body = null; Query FuzzyQuery_Title = null; Query FuzzyQuery_body = null; Query WildcardQuery_title = null; Query WildcardQuery_body = null; if (isLike) { //以什么开头，输入“ja”就可以搜到包含java和javascript两项结果了 PrefixQuery_title = new PrefixQuery(new Term("title", keywords)); PrefixQuery_body = new PrefixQuery(new Term("body", keywords)); //直接模糊匹配,假设你想搜索跟‘wuzza’相似的词语,你可能得到‘fuzzy’和‘wuzzy’。 FuzzyQuery_Title = new FuzzyQuery(new Term("title", keywords)); FuzzyQuery_body = new FuzzyQuery(new Term("body", keywords)); //通配符搜索 WildcardQuery_title = new WildcardQuery(new Term("title", keywords)); WildcardQuery_body = new WildcardQuery(new Term("body", keywords)); } //MultiFieldQueryParser BooleanQuery bq = new BooleanQuery(); bq.Add(titleQuery, BooleanClause.Occur.SHOULD);//表示条件关系为“or”,BooleanClause.Occur.MUST表示“and”,BooleanClause.Occur.MUST_NOT表示“not” if (isLike) { bq.Add(PrefixQuery_title, BooleanClause.Occur.SHOULD); bq.Add(PrefixQuery_body, BooleanClause.Occur.SHOULD); bq.Add(FuzzyQuery_Title, BooleanClause.Occur.SHOULD); bq.Add(FuzzyQuery_body, BooleanClause.Occur.SHOULD); bq.Add(WildcardQuery_title, BooleanClause.Occur.SHOULD); bq.Add(WildcardQuery_body, BooleanClause.Occur.SHOULD); } //创建一个结果收集器（收集结果最大数为1000页） TopScoreDocCollector collector = TopScoreDocCollector.create(pageSize * 1000, true); search.Search(bq, null, collector); TopDocs topDoc = collector.TopDocs(0, collector.GetTotalHits()); //搜索结果总数超出指定收集器大小，则摈弃 if (topDoc.totalHits > pageSize * 1000) count = pageSize * 1000; else count = topDoc.totalHits; int i = (currentPage - 1) * pageSize; #region Lucene.Net.Documents.Document docs; PanGu.HighLight.Highlighter highlighter; PanGu.HighLight.SimpleHTMLFormatter simpleHTMLFormatter; while (i < count && storeList.Count < pageSize) { modelstore = new StoreInfo(); docs = search.Doc(topDoc.scoreDocs[i].doc); try { string strTitle = docs.Get("title"); string strContent = docs.Get("body"); modelstore.Store_ID = Convert.ToInt32(docs.Get("id")); //高亮显示设置 simpleHTMLFormatter = new PanGu.HighLight.SimpleHTMLFormatter("<span style=\"color:red;\">", "</span>"); highlighter = new PanGu.HighLight.Highlighter(simpleHTMLFormatter, new PanGu.Segment()); highlighter.FragmentSize = 200; //string GetBestFragment(keywords,content)方法会按照SimpleHTMLFormatter构造的格式对content中关键字进行高亮显示 //但如果content中不包含keywords则会返回空值，故需要按照如下进行判断 modelstore.Description = highlighter.GetBestFragment(keywords, strContent); if (string.IsNullOrEmpty(modelstore.Description)) { modelstore.Description = strContent; } modelstore.Store_Name = highlighter.GetBestFragment(keywords, strTitle); if (string.IsNullOrEmpty(modelstore.Store_Name)) { modelstore.Store_Name = strTitle; } } catch (Exception e) { continue; } finally { storeList.Add(modelstore); i++; } } #endregion search.Close(); pageCount = Convert.ToInt32(Math.Ceiling((double)collector.GetTotalHits() / pageSize)); return storeList; }
控制器
public ActionResult Index(string id = "", string kw = "", string isLike = "0", int pageIndex = 1) { string strKeyWorld = HttpDecode(id.Length == 0 ? kw : id); int pageSize = 10; int intCount = 0; int intPageCount = 0; bool _boolisLike = isLike == "1" ? true : false; List<StoreInfo> StoreInfoList = null; Stopwatch watch = new Stopwatch(); watch.Start();//调用方法开始计时 if (strKeyWorld.Length > 0) { StoreInfoList = LuceneNetUtils.GetSearchList(strKeyWorld, pageSize, pageIndex, out intCount, out intPageCount, _boolisLike); } watch.Stop();//调用方法计时结束 double time = watch.Elapsed.TotalSeconds;//总共花费的时间 ViewBag.time = time; ViewBag.kw = strKeyWorld; ViewBag.count = intCount; ViewBag.pageIndex = pageIndex; ViewBag.pageSize = pageSize; ViewBag.intPageCount = intPageCount; ViewBag._boolisLike = _boolisLike; return View(StoreInfoList); }
View视图
注意：ShowPageBarMvc是个页码条，在页面当中用的时候一定要引用所在命名空间，或者添加webConfig
@using System.Web.Optimization; @using LX.EFOPT.Web.Main.CommonUtils; @using PagedList; @using PagedList.Mvc; @model List<LX.EFOPT.Web.Main.Models.StoreInfo> @{ Layout = "/Views/Shared/_LayoutLucene.cshtml"; } <script src="~/Js/jquery.ds.js"></script> <div class="container-fluid"> <div class="row-fluid"> <div class="span12"> <form class="form-search" action="/LuceneNet/index/" onsubmit="return _search.checkInput();"> <input class="input-medium search-query" id="inputKw" name="kw" value="@ViewBag.kw" type="text" /> <button id="btn_search" type="submit" class="btn">查找</button> <input type="checkbox" @(ViewBag._boolisLike ? "checked=checked":"") name="isLike" id="isLike" value="1" /><label for="isLike">是否开启模糊查询</label> <button id="btn_createIndex1" type="button" class="btn">创建索引-方式1</button> <button id="btn_createIndex2" type="button" class="btn">创建索引-方式2</button> </form> <div id="ajaxData" style="width:80%"> @{ if (Model != null) { <div style="margin-top:20px;"><p>获得约 @ViewBag.count 条结果，用时 @ViewBag.time 秒</p></div> foreach (var item in Model) { <div style="margin-top:20px;"> <h4>@item.Store_ID @Html.Raw(item.Store_Name)</h4> <p>@Html.Raw(item.Description)</p> <p><a class="btn" href="javascript:;">查看更多 »</a></p> </div> } int pageIndex = ViewBag.pageIndex; int pageSize = ViewBag.pageSize; int intCount = ViewBag.count; string kw = ViewBag.kw; string isLike = ViewBag._boolisLike ? "1":"0"; @Html.ShowPageBarMvc("/LuceneNet/Index", pageIndex, pageSize, intCount, "kw=" + kw + "&isLike=" + isLike) } else { <div style="margin-top:20px;"><h4>没有找到你想要的数据</h4><p>可以更改关键字试试</p></div> } } </div> </div> </div> </div> @Scripts.Render("/LuceneNet/js/Search.js")
Js创建索引
/// <reference path="../../Js/jquery-1.7.1.min.js" /> /// <reference path="../../Js/jquery.ds.js" /> function LuceneNet() { this.$_inputKw = $("#inputKw"); this.$_btn_search = $("#btn_search"); this.$_btn_createIndex1 = $("#btn_createIndex1"); this.$_btn_createIndex2 = $("#btn_createIndex2"); } LuceneNet.prototype.init = function () { var _self = this; _self.$_btn_createIndex1.on("click", function () { _self.createIndex(1); }); _self.$_btn_createIndex2.on("click", function () { _self.createIndex(2); }); }; LuceneNet.prototype.checkInput = function () { _self = this; if (!_self.$_inputKw.val().length) { return false; } } LuceneNet.prototype.createIndex = function (_type) { _self = this; $.ds.tips.open("loading", "请稍后.."); $.ajax({ url: "/LuceneNet/CreateIndex", type: "get", dataType: "json", data: { type: _type }, contentType: "application/x-www-form-urlencoded; charset=utf-8", success: function (data) { $.ds.tips.close(); } }); } LuceneNet.prototype.Search = function () { _self = this; $.ajax({ url: "/", type: "get", dataType: "json", contentType: "application/x-www-form-urlencoded; charset=utf-8", data: { kw: decodeURI(_self.$_inputKw.val()) }, success: function (data) { } }); }; var _search = new LuceneNet(); _search.init();
下一篇将继续折腾添加索引和删除索引，和数据库保持同步。
源代码只是我在公司测试的一个项目，比较杂，没有办法全部提供下载。但是我会把代码上传到git或者是网盘
谢谢。
原文地址：http://www.cnblogs.com/lxsweat/p/4386420.html
