10.5 搜索的优化版

@{
    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collector

            int 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Document
                SearchResult 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collector

            int 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Document
                SearchResult 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());
        }