全文搜索Lucene.Net优化

@{ViewBag.Title = "Index";
}
@model PagedList<SearchDemo.Models.SearchResult>
@using Webdiyer.WebControls.Mvc;
@using SearchDemo.Models;
<style type="text/css">
.search-text2{ display:block; width:528px; height:26px; line-height:26px; float:left; margin:3px 5px; border:1px solid gray; outline:none; font-family:'Microsoft Yahei'; font-size:14px;}
.search-btn2{width:102px; height:32px; line-height:32px; cursor:pointer; border:0px; background-color:#d6000f;font-family:'Microsoft Yahei'; font-size:16px;color:#f3f3f3;}
.search-list-con{width:640px; background-color:#fff; overflow:hidden; margin-top:0px; padding-bottom:15px; padding-top:5px;}
.search-list{width:600px; overflow:hidden; margin:15px 20px 0px 20px;}
.search-list dt{font-family:'Microsoft Yahei'; font-size:16px; line-height:20px; margin-bottom:7px; font-weight:normal;}
.search-list dt a{color:#2981a9;}
.search-list dt a em{ font-style:normal; color:#cc0000;}
#divKeyWords {text-align:left;width:520px;padding-left:4px;}
#divKeyWords a {text-decoration:none;}
#divKeyWords a:hover {color:red;}
</style>
<link href="~/lib/Autocomplete/css/ui-lightness/jquery-ui-1.8.17.custom.css" rel="stylesheet" />
@using(@Html.BeginForm(null, null, FormMethod.Get))
{@Html.Hidden("hidfIsOr")<div>@Html.TextBox("txtSearch", null, new { @class="search-text2"})<input type="submit" value="搜索" name="btnSearch" id="btnSearch"  class="search-btn2"/><input type="checkbox" id="isOr" value="false"/>或查询</div><div id="divKeyWords"><span>热门搜索：</span>@if (ViewBag.KeyWords != null) {foreach (string v in ViewBag.KeyWords) { <a href="#">@v</a>}}</div><div class="search-list-con"><dl class="search-list">@if (Model != null&& Model.Count > 0){foreach (var viewModel in Model){<dt><a href="@viewModel.Url" target="_blank">@MvcHtmlString.Create(viewModel.Title)</a><span style="margin-left:50px;">@viewModel.CreateTime</span></dt><dd>@MvcHtmlString.Create(viewModel.Msg)</dd>}} @Html.Pager(Model, new PagerOptions{PageIndexParameterName = "id",ShowPageIndexBox = true,FirstPageText = "首页",PrevPageText = "上一页",NextPageText = "下一页",LastPageText = "末页",PageIndexBoxType = PageIndexBoxType.TextBox,PageIndexBoxWrapperFormatString = "请输入页数{0}",GoButtonText = "转到"})<br />>>分页 共有 @(Model==null? 0: Model.TotalItemCount) 篇文章 @(Model==null?0:Model.CurrentPageIndex)/@(Model==null?0:Model.TotalPageCount)</dl></div><div>@ViewData["ShowInfo"]</div>
}
<script type="text/javascript">$(function () {$("#divKeyWords a").click(function () {$("#txtSearch").val($(this).html());$("#btnSearch").click();});getKeyWordsList("txtSearch");$("#isOr").click(function () {if ($(this).attr("checked") == "checked") {$("#hidfIsOr").val(true);}else {$("#hidfIsOr").val(false);}});if ($("#hidfIsOr").val() == "true") {$("input[type='checkbox']").prop("checked", true);}});//自动加载搜索列表function getKeyWordsList(txt) {if (txt == undefined || txt == "")return;$("#" + txt).autocomplete({source: "/LastSearch/GetKeyWordsList",minLength: 1});}
</script>
<script src="~/lib/Autocomplete/js/jquery-ui-1.8.17.custom.min.js"></script>

 public class LastSearchController : Controller{//// GET: /LastSearch/string indexPath = System.Configuration.ConfigurationManager.AppSettings["lucenedir"];private SearchDemoContext db = new SearchDemoContext();public ActionResult Index(string txtSearch, bool? hidfIsOr, int id = 1){PagedList<SearchResult> list = null;if (!string.IsNullOrEmpty(txtSearch))//如果点击的是查询按钮
            {//list = Search(txtSearch);list = (hidfIsOr == null || hidfIsOr.Value == false) ? OrSearch(txtSearch, id) : AndSearch(txtSearch, id);}var keyWords = db.SearchTotal.OrderByDescending(a => a.SearchCounts).Select(x => x.KeyWords).Skip(0).Take(6).ToList();ViewBag.KeyWords = keyWords;return View(list);}//与查询PagedList<SearchResult> AndSearch(String kw, int pageNo, int pageLen = 4){FSDirectory directory = FSDirectory.Open(new DirectoryInfo(indexPath), new NoLockFactory());IndexReader reader = IndexReader.Open(directory, true);IndexSearcher searcher = new IndexSearcher(reader);PhraseQuery query = new PhraseQuery();//查询条件PhraseQuery titleQuery = new PhraseQuery();//标题查询条件List<string> lstkw = LuceneHelper.PanGuSplitWord(kw);//对用户输入的搜索条件进行拆分。foreach (string word in lstkw){query.Add(new Term("Content", word));//contains("Content",word)titleQuery.Add(new Term("Title", word));}query.SetSlop(100);//两个词的距离大于100（经验值）就不放入搜索结果，因为距离太远相关度就不高了
BooleanQuery bq = new BooleanQuery();//Occur.Should 表示 Or , Must 表示 and 运算
            bq.Add(query, BooleanClause.Occur.SHOULD);bq.Add(titleQuery, BooleanClause.Occur.SHOULD);TopScoreDocCollector collector = TopScoreDocCollector.create(1000, true);//盛放查询结果的容器searcher.Search(bq, null, collector);//使用query这个查询条件进行搜索，搜索结果放入collectorint recCount=collector.GetTotalHits();//总的结果条数ScoreDoc[] docs = collector.TopDocs((pageNo - 1) * pageLen, pageNo*pageLen).scoreDocs;//从查询结果中取出第m条到第n条的数据
List<SearchResult> list = new List<SearchResult>();string msg = string.Empty;string title = string.Empty;for (int i = 0; i < docs.Length; i++)//遍历查询结果
            {int docId = docs[i].doc;//拿到文档的id，因为Document可能非常占内存（思考DataSet和DataReader的区别）//所以查询结果中只有id，具体内容需要二次查询Document doc = searcher.Doc(docId);//根据id查询内容。放进去的是Document，查出来的还是DocumentSearchResult result = new SearchResult();result.Id = Convert.ToInt32(doc.Get("Id"));msg = doc.Get("Content");//只有 Field.Store.YES的字段才能用Get查出来result.Msg = LuceneHelper.CreateHightLight(kw, msg);//将搜索的关键字高亮显示。title = doc.Get("Title");foreach (string word in lstkw){title=title.Replace(word,"<span style='color:red;'>"+word+"</span>");}//result.Title=LuceneHelper.CreateHightLight(kw, title);result.Title = title;result.CreateTime = Convert.ToDateTime(doc.Get("CreateTime"));result.Url = "/Article/Details?Id=" + result.Id + "&kw=" + kw;list.Add(result);}//先将搜索的词插入到明细表。SearchDetail _SearchDetail = new SearchDetail { Id = Guid.NewGuid(), KeyWords = kw, SearchDateTime = DateTime.Now };db.SearchDetail.Add(_SearchDetail);int r = db.SaveChanges();PagedList<SearchResult> lst = new PagedList<SearchResult>(list, pageNo, pageLen, recCount);lst.TotalItemCount = recCount;lst.CurrentPageIndex = pageNo;return lst;}//或查询PagedList<SearchResult> OrSearch(String kw, int pageNo, int pageLen = 4){FSDirectory directory = FSDirectory.Open(new DirectoryInfo(indexPath), new NoLockFactory());IndexReader reader = IndexReader.Open(directory, true);IndexSearcher searcher = new IndexSearcher(reader);List<PhraseQuery> lstQuery = new List<PhraseQuery>();List<string> lstkw = LuceneHelper.PanGuSplitWord(kw);//对用户输入的搜索条件进行拆分。foreach (string word in lstkw){PhraseQuery query = new PhraseQuery();//查询条件query.SetSlop(100);//两个词的距离大于100（经验值）就不放入搜索结果，因为距离太远相关度就不高了query.Add(new Term("Content", word));//contains("Content",word)
PhraseQuery titleQuery = new PhraseQuery();//查询条件titleQuery.Add(new Term("Title", word));lstQuery.Add(query);lstQuery.Add(titleQuery);}BooleanQuery bq = new BooleanQuery();foreach (var v in lstQuery){//Occur.Should 表示 Or , Must 表示 and 运算
                bq.Add(v, BooleanClause.Occur.SHOULD);}TopScoreDocCollector collector = TopScoreDocCollector.create(1000, true);//盛放查询结果的容器searcher.Search(bq, null, collector);//使用query这个查询条件进行搜索，搜索结果放入collectorint recCount = collector.GetTotalHits();//总的结果条数ScoreDoc[] docs = collector.TopDocs((pageNo - 1) * pageLen, pageNo * pageLen).scoreDocs;//从查询结果中取出第m条到第n条的数据
List<SearchResult> list = new List<SearchResult>();string msg = string.Empty;string title = string.Empty;for (int i = 0; i < docs.Length; i++)//遍历查询结果
            {int docId = docs[i].doc;//拿到文档的id，因为Document可能非常占内存（思考DataSet和DataReader的区别）//所以查询结果中只有id，具体内容需要二次查询Document doc = searcher.Doc(docId);//根据id查询内容。放进去的是Document，查出来的还是DocumentSearchResult result = new SearchResult();result.Id = Convert.ToInt32(doc.Get("Id"));msg = doc.Get("Content");//只有 Field.Store.YES的字段才能用Get查出来result.Msg = LuceneHelper.CreateHightLight(kw, msg);//将搜索的关键字高亮显示。title = doc.Get("Title");foreach (string word in lstkw){title = title.Replace(word, "<span style='color:red;'>" + word + "</span>");}//result.Title=LuceneHelper.CreateHightLight(kw, title);result.Title = title;result.CreateTime = Convert.ToDateTime(doc.Get("CreateTime"));result.Url = "/Article/Details?Id=" + result.Id + "&kw=" + kw;list.Add(result);}//先将搜索的词插入到明细表。SearchDetail _SearchDetail = new SearchDetail { Id = Guid.NewGuid(), KeyWords = kw, SearchDateTime = DateTime.Now };db.SearchDetail.Add(_SearchDetail);int r = db.SaveChanges();PagedList<SearchResult> lst = new PagedList<SearchResult>(list, pageNo, pageLen, recCount);lst.TotalItemCount = recCount;lst.CurrentPageIndex = pageNo;return lst;}/// <summary>/// 获取客户列表 模糊查询/// </summary>/// <param name="term"></param>/// <returns></returns>public string GetKeyWordsList(string term){if (string.IsNullOrWhiteSpace(term))return null;var list = new KeyWordsTotalService().GetSearchMsg(term);//序列化对象//尽量不要用JavaScriptSerializer，为什么？性能差,完全可用Newtonsoft.Json来代替//System.Web.Script.Serialization.JavaScriptSerializer js = new System.Web.Script.Serialization.JavaScriptSerializer();//return js.Serialize(list.ToArray());return JsonConvert.SerializeObject(list.ToArray());}