一、项目准备

1.1 前端资源

一个html页面+css+js
下载地址：https://github.com/wyn-365/springboot-es-jd.git

1.2 ElasticSearch 7.6.1

下载慢的小伙伴们可以到 华为云的镜像去下载 速度很快，自己找对应版本就可以
ElasticSearch: https://mirrors.huaweicloud.com/elasticsearch/?C=N&O=D
kibana: https://mirrors.huaweicloud.com/kibana/?C=N&O=D

1.3 启动ES+kibana

windows 全部双击bin下的bat文件即可

可以不适用kibana可视化管理

1.4 创建Springboot工程

1.4.1 修改pom

<properties>
        <java.version>1.8</java.version>
        <elasticsearch.version>7.6.1</elasticsearch.version>
    </properties>

        <dependency>
            <groupId>org.jsoup</groupId>
            <artifactId>jsoup</artifactId>
            <version>1.10.2</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.62</version>
        </dependency>

1.4.2 修改yml

spring.thymeleaf.cache=false

1.4.3 引入静态资源

1.4.4 配置ElasticSearch

public class ElasticSearchConfig{
    @Bean
    public RestHighLevelClient restHighLevelClient(){
        RestHighLevelClient	client = new RestHighLevelClient(
                RestClient.builder(
                        new HttpHost("localhost",9200,"http")));
        return client;
    }
}

1.4.5 IndexController

@Controller
public class IndexController {

    @GetMapping({"/","/index"})
    public String index(){
        return "index";
    }
}

二、爬取京东数据到ES中

2.1 Content实体类

@Data
@NoArgsConstructor
@AllArgsConstructor
public class Content {
    private String title;
    private String img;
    private String price;
}

2.2 ContentController

@RestController
public class ContentController {
    @Autowired
    private ContentService contentService;

    @GetMapping("/parse/{keyword}")
    public Boolean parse(@PathVariable("keyword") String keyword) throws IOException {
        return contentService.parseContent(keyword);
    }
}

2.3 ContentService

@Service
public class ContentService {
    @Autowired
    private RestHighLevelClient restHighLevelClient;

    // 1.解析数据 放入ES索引库
    public Boolean parseContent(String keywords) throws IOException {
        List<Content> contents = new HtmlParseUtil().parseJD(keywords);
        // 2.查询的数据批量插入ES中
        BulkRequest bulkRequest = new BulkRequest();
        bulkRequest.timeout("3m");
        for (int i = 0; i < contents.size(); i++) {
            bulkRequest.add(new IndexRequest("jd_goods")
            .source(JSON.toJSONString(contents.get(i)),XContentType.JSON)
            );
        }
        BulkResponse bulk = restHighLevelClient.bulk(bulkRequest, RequestOptions.DEFAULT);
        return !bulk.hasFailures();
    }
}

2.4 创建索引库 jd_goods

@SpringBootTest
class SpringbootEsJdApplicationTests {

    @Autowired
    private RestHighLevelClient client;

    // 1.创建索引
    @Test
    void testCreateIndex() throws IOException {
        CreateIndexRequest request = new CreateIndexRequest("jd_goods");
        CreateIndexResponse response = client.indices().create(request, RequestOptions.DEFAULT);

        System.out.println(response);
    }
}

2.5 测试执行搜索elasticsearch 入库

到这里关于elasticsearch的数据就已经批量调入到ES中了。

三、搜索功能【关键词非高亮】

3.1 ContentController

	// 不带高亮
    @GetMapping("/search/{keyword}/{pageNo}/{pageSize}")
    public List<Map<String,Object>> search(@PathVariable("keyword") String keyword,
                                           @PathVariable("pageNo") int pageNo,
                                           @PathVariable("pageSize") int pageSize) throws IOException {
        return contentService.searchPage(keyword, pageNo, pageSize);
    }

3.2 ContentService

 // 2.实现搜索功能
    public List<Map<String,Object>> searchPage(String keyword,int pageNo, int pageSize) throws IOException {
        if (pageNo<=1){
            pageNo=1;
        }


        // 条件搜索
        SearchRequest jd_goods = new SearchRequest("jd_goods");
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();

        // 分页
        sourceBuilder.from(pageNo);
        sourceBuilder.size(pageSize);

        // 精准查询
        TermQueryBuilder termQueryBuilder = QueryBuilders.termQuery("title",keyword);
        sourceBuilder.query(termQueryBuilder);
        sourceBuilder.timeout(new TimeValue(60, TimeUnit.SECONDS));

        // 执行
        jd_goods.source(sourceBuilder);
        SearchResponse response = restHighLevelClient.search(jd_goods, RequestOptions.DEFAULT);

        ArrayList<Map<String,Object>> list = new ArrayList<>();
        for (SearchHit documentFields : response.getHits().getHits()) {
            list.add(documentFields.getSourceAsMap());
        }
        return list;
    }

3.3 页面Index.html【渲染】

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">

<head>
    <meta charset="utf-8"/>
    <title>Java-ES仿京东实战</title>
    <link rel="stylesheet" th:href="@{/css/style.css}"/>
</head>

<body class="pg">
<div class="page" id="app">
    <div id="mallPage" class=" mallist tmall- page-not-market ">

        <!-- 头部搜索 -->
        <div id="header" class=" header-list-app">
            <div class="headerLayout">
                <div class="headerCon ">
                    <!-- Logo-->
                    <h1 id="mallLogo">
                        <img th:src="@{/images/jdlogo.png}" alt="">
                    </h1>

                    <div class="header-extra">

                        <!--搜索-->
                        <div id="mallSearch" class="mall-search">
                            <form name="searchTop" class="mallSearch-form clearfix">
                                <fieldset>
                                    <legend>天猫搜索</legend>
                                    <div class="mallSearch-input clearfix">
                                        <div class="s-combobox" id="s-combobox-685">
                                            <div class="s-combobox-input-wrap">
                                                <input v-model="keyword" type="text" autocomplete="off" value="dd" id="mq"
                                                       class="s-combobox-input" aria-haspopup="true">
                                            </div>
                                        </div>
                                        <button @click.prevent="searchKey" type="submit" id="searchbtn">搜索</button>
                                    </div>
                                </fieldset>
                            </form>
                            <ul class="relKeyTop">
                                <li><a>Java</a></li>
                                <li><a>前端</a></li>
                                <li><a>Linux</a></li>
                                <li><a>大数据</a></li>
                                <li><a>聊理财</a></li>
                            </ul>
                        </div>
                    </div>
                </div>
            </div>
        </div>

        <!-- 商品详情页面 -->
        <div id="content">
            <div class="main">
                <!-- 品牌分类 -->
                <form class="navAttrsForm">
                    <div class="attrs j_NavAttrs" style="display:block">
                        <div class="brandAttr j_nav_brand">
                            <div class="j_Brand attr">
                                <div class="attrKey">
                                    品牌
                                </div>
                                <div class="attrValues">
                                    <ul class="av-collapse row-2">
                                        <li><a href="#"> elasticsearch</a></li>
                                        <li><a href="#"> Java </a></li>
                                    </ul>
                                </div>
                            </div>
                        </div>
                    </div>
                </form>

                <!-- 排序规则 -->
                <div class="filter clearfix">
                    <a class="fSort fSort-cur">综合<i class="f-ico-arrow-d"></i></a>
                    <a class="fSort">人气<i class="f-ico-arrow-d"></i></a>
                    <a class="fSort">新品<i class="f-ico-arrow-d"></i></a>
                    <a class="fSort">销量<i class="f-ico-arrow-d"></i></a>
                    <a class="fSort">价格<i class="f-ico-triangle-mt"></i><i class="f-ico-triangle-mb"></i></a>
                </div>

                <!-- 商品详情 -->
                <div class="view grid-nosku">

                    <div class="product" v-for="result in results">
                        <div class="product-iWrap">
                            <!--商品封面-->
                            <div class="productImg-wrap">
                                <a class="productImg">
                                    <img :src="result.img">
                                </a>
                            </div>
                            <!--价格-->
                            <p class="productPrice">
                                <em><b>¥</b>{{result.price}}</em>
                            </p>
                            <!--标题-->
                            <p class="productTitle">
                                <a v-html="result.title"></a>
                            </p>
                            <!-- 店铺名 -->
                            <div class="productShop">
                                <span>店铺： 狂神说Java </span>
                            </div>
                            <!-- 成交信息 -->
                            <p class="productStatus">
                                <span>月成交<em>999笔</em></span>
                                <span>评价 <a>3</a></span>
                            </p>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>


<script th:src="@{/js/axios.min.js}"></script>
<script th:src="@{/js/vue.min.js}"></script>

<script>
    new Vue({
        el: '#app',
        data: {
            keyword:'', // 搜索的关键字
            results:[]  // 搜索结果
        },
        methods:{
            searchKey(){
               var keyword = this.keyword;


               // 对接接口
                axios.get('search/' + keyword + "/1/10").then(response => {
                    // console.log(response);
                    this.results = response.data; // 绑定数据
                })

            }
        }
    })
</script>

</body>
</html>

3.4 测试执行

四、搜索功能【关键词高亮】

4.1 ContentService

// 3.实现搜索高亮功能
    public List<Map<String,Object>> searchHighLightPage(String keyword,int pageNo, int pageSize) throws IOException {
        if (pageNo<=1){
            pageNo=1;
        }


        // 条件搜索
        SearchRequest jd_goods = new SearchRequest("jd_goods");
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();

        // 分页
        sourceBuilder.from(pageNo);
        sourceBuilder.size(pageSize);

        // 精准查询
        TermQueryBuilder termQueryBuilder = QueryBuilders.termQuery("title",keyword);
        sourceBuilder.query(termQueryBuilder);
        sourceBuilder.timeout(new TimeValue(60, TimeUnit.SECONDS));

        // 高亮
        HighlightBuilder highlightBuilder = new HighlightBuilder();
        highlightBuilder.field("title");
        // 多个高亮
        highlightBuilder.requireFieldMatch(false);
        highlightBuilder.preTags("<span style='color:red'>");
        highlightBuilder.postTags("</span>");
        sourceBuilder.highlighter(highlightBuilder);


        // 执行
        jd_goods.source(sourceBuilder);
        SearchResponse response = restHighLevelClient.search(jd_goods, RequestOptions.DEFAULT);

        ArrayList<Map<String,Object>> list = new ArrayList<>();
        for (SearchHit documentFields : response.getHits().getHits()) {
            // 解析高亮字段
            Map<String, HighlightField> highlightFields = documentFields.getHighlightFields();
            HighlightField title = highlightFields.get("title");
            Map<String, Object> sourceAsMap = documentFields.getSourceAsMap();
            // 原来的字段替换为高亮字段
            if (title!=null){
                Text[] fragments = title.fragments();
                String n_title = "";
                for (Text text : fragments){
                    n_title += text;
                }
                sourceAsMap.put("title",n_title);
            }
            list.add(sourceAsMap);
        }
        return list;
    }

4.2 修改ContentController

    @GetMapping("/search/{keyword}/{pageNo}/{pageSize}")
    public List<Map<String,Object>> search(@PathVariable("keyword") String keyword,
                                           @PathVariable("pageNo") int pageNo,
                                           @PathVariable("pageSize") int pageSize) throws IOException {
        return contentService.searchHighLightPage(keyword, pageNo, pageSize);
    }

4.3 重启测试

京东搜索引擎案例结束。