瞎折腾之 Lucene.Net + MVC 搜索功能（上）

2022-11-22 09:55:40

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 = ;

            count = ;

            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 * , true);

            search.Search(bq, null, collector);

            TopDocs topDoc = collector.TopDocs(, collector.GetTotalHits());

            //搜索结果总数超出指定收集器大小，则摈弃

            if (topDoc.totalHits > pageSize * )

                count = pageSize * ;

            else

                count = topDoc.totalHits;

            int i = (currentPage - ) * 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 = ;

                    //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 = "", int pageIndex = )

        {

            string strKeyWorld = HttpDecode(id.Length ==  ? kw : id);

            int pageSize = ;

            int intCount = ;

            int intPageCount = ;

            bool _boolisLike = isLike == "" ? true : false;

            List<StoreInfo> StoreInfoList = null;

            Stopwatch watch = new Stopwatch();

            watch.Start();//调用方法开始计时

            if (strKeyWorld.Length > )

            {

                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>&nbsp;

                <input type="checkbox" @(ViewBag._boolisLike ? "checked=checked":"")  name="isLike" id="isLike" value="" /><label for="isLike">是否开启模糊查询</label>

                &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

                <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 ? "":"";

                    @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

码农公寓

前言

效果显示

进入主题

核心代码

方法

控制器

View视图

Js创建索引

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