第132天学习打卡（ElasticSearch 仿京东搜索 ）

京东搜索

在pom.xml中导入依赖

 <!--        引入fastjson-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.75</version>
        </dependency>

爬虫

数据问题？数据库获取，消息队列中获取，都可以成为数据源！ 爬虫！

爬取数据：（获取请求返回的页面信息，筛选出我们想要的数据就可以了！）

导入依赖pom.xml

<!-- https://mvnrepository.com/artifact/org.jsoup/jsoup -->
<dependency>
    <groupId>org.jsoup</groupId>
    <artifactId>jsoup</artifactId>
    <version>1.13.1</version>
</dependency>

utils HtmlParseUtil.java

package com.kuang.utils;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

import java.io.IOException;
import java.net.URL;

public class HtmlParseUtil {
   
    public static void main(String[] args) throws IOException {
   
        //获取请求 https://search.jd.com/Search?keyword=java
        //前提：需要联网
        String url = "https://search.jd.com/Search?keyword=java";
        //解析网页 (Jsoup返回Document 对象就是浏览器Document 对象)
        Document document = Jsoup.parse(new URL(url), 30000);
        //所有你在js中可以使用的方法，这里都能使用
        Element element = document.getElementById("J_goodsList");
       System.out.println(element.html());
        //获取所有的li元素
        Elements elements = document.getElementsByTag("li");
        //获取元素中的内容 这里el，就是每一个li标签了
        for (Element el : elements) {
   
            String img = el.getElementsByTag("img").eq(0).attr("data-lazy-img");
            String price = el.getElementsByClass("p-price").eq(0).text();
            String title = el.getElementsByClass("p-name").eq(0).text();
            System.out.println("=============================");
            System.out.println(img);
            System.out.println(price);
            System.out.println(title);

        }


    }
}

对上面的代码进行封装

package com.kuang.utils;
import com.kuang.pojo.Content;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
import org.springframework.stereotype.Component;

import java.net.URL;
import java.util.ArrayList;
import java.util.List;
@Component
public class HtmlParseUtil {
   
//    public static void main(String[] args) throws Exception {
   
//        new HtmlParseUtil().parseJD("java").forEach(System.out::println);
//
//    }
    public List<Content> parseJD(String keywords) throws Exception {
   

        String url = "https://search.jd.com/Search?keyword=" + keywords;

        Document document = Jsoup.parse(new URL(url), 30000);

        Element element = document.getElementById("J_goodsList");
        System.out.println(element.html());
        //获取所有的li元素
        Elements elements = document.getElementsByTag("li");
        ArrayList<Content> goodsList = new ArrayList<>();
        //获取元素中的内容 这里el，就是每一个li标签了
        for (Element el : elements) {
   
            String img = el.getElementsByTag("img").eq(0).attr("data-lazy-img");
            String price = el.getElementsByClass("p-price").eq(0).text();
            String title = el.getElementsByClass("p-name").eq(0).text();
            Content content = new Content();
            content.setTitle(title);
            content.setPrice(price);
            content.setImg(img);
            goodsList.add(content);


        }
        return  goodsList;

    }
}

config ElasticSearchClientConfig.java

package com.kuang.config;

import org.apache.http.HttpHost;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

//spring的两步骤
//1.找对象
//2.放到spring中待用
//3.如果是springboot 就先分析源码
@Configuration  //相当于xml文件 r
public class ElasticSearchClientConfig {
   
    // spring <beans id = restHighLevelClient class = RestHighLevelClient>
    @Bean
    public RestHighLevelClient restHighLevelClient(){
   
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(
                        new HttpHost("127.0.0.1", 9200, "http")));
        return client;


    }
}

controller

ContentController.java

package com.kuang.controller;

import com.kuang.service.ContentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;

import java.io.IOException;
import java.util.List;
import java.util.Map;

//请求编写
@RestController
public class ContentController {
   
    @Autowired
    private ContentService contentService;

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

    @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.searchPageHighlightBuilder(keyword, pageNo, pageSize);




    }
}

IndexController.java

package com.kuang.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;

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

pojo Content.java

package com.kuang.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@AllArgsConstructor
@NoArgsConstructor
public class Content {
   
    private String title;
    private String img;
    private String price;
    //可以自己添加属性
}

service ContentService.java

package com.kuang.service;

import com.alibaba.fastjson.JSON;
import com.kuang.pojo.Content;
import com.kuang.utils.HtmlParseUtil;
import org.elasticsearch.action.bulk.BulkRequest;
import org.elasticsearch.action.bulk.BulkResponse;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.text.Text;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.index.query.TermQueryBuilder;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightField;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.naming.directory.SearchResult;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;

//业务编写
@Service
public class ContentService {
   
    @Autowired //注入自己的类
    private RestHighLevelClient restHighLevelClient;
不能直接使用 @Autowired  需要spring容器
//    public static void main(String[] args) throws Exception {
   
//        new ContentService().parseContent("java");
//    }
    //1.解析数据放入es索引中
    public Boolean parseContent(String keywords) throws Exception {
   
        List<Content> contents = new HtmlParseUtil().parseJD(keywords);
        //把查询的数据放入es中
        BulkRequest bulkRequest = new BulkRequest();
        bulkRequest.timeout("2m");
        for (int i = 0; i < contents.size(); i++) {
   
//            System.out.println(JSON.toJSONString(contents.get(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.获取这些数据 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 searchRequest = new SearchRequest("jd_goods");
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();

        //分页
        sourceBuilder.from(pageNo);//从第几条数据开始（默认是从0开始）
        sourceBuilder.size(pageSize);
        //精准匹配
        TermQueryBuilder termQueryBuilder = QueryBuilders.termQuery("title", keyword);
        sourceBuilder.query(termQueryBuilder);
        sourceBuilder.timeout(new TimeValue(60, TimeUnit.SECONDS));

        //执行搜索
        searchRequest.source(sourceBuilder);
        SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
        //解析结果
        ArrayList<Map<String, Object>> list = new ArrayList<>();
        for (SearchHit documentFields : searchResponse.getHits().getHits()) {
   
            list.add(documentFields.getSourceAsMap());

        }
        return list;


    }
    //3.获取这些数据实现搜索高亮功能
    public List<Map<String, Object>> searchPageHighlightBuilder(String keyword, int pageNo, int pageSize) throws IOException {
   
        if (pageNo<=1){
   
            pageNo = 1;
        }
        //条件搜索
        SearchRequest searchRequest = new SearchRequest("jd_goods");
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();

        //分页
        sourceBuilder.from(pageNo);//从第几条数据开始（默认是从0开始）
        sourceBuilder.size(pageSize);
        //精准匹配
        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");
        highlightBuilder.requireFieldMatch(false); //多个高亮显示！
        highlightBuilder.preTags("<span style='color:red'>");
        highlightBuilder.postTags("</span>");
        sourceBuilder.highlighter(highlightBuilder);

        //执行搜索
        searchRequest.source(sourceBuilder);
        SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
        //解析结果
        ArrayList<Map<String, Object>> list = new ArrayList<>();
        for (SearchHit hit : searchResponse.getHits().getHits()) {
   
            Map<String, HighlightField> highlightFields = hit.getHighlightFields();
            HighlightField title = highlightFields.get("title");
            Map<String, Object> sourceAsMap = hit.getSourceAsMap(); //原来的结果

            //解析高亮的字段 将原来的字段换为我们高亮的字段即可！
            if (title != null){
   
                Text[] fragments = title.fragments();
                String n_title = "";
                for (Text text : fragments) {
   
                    n_title += text;

                }
                sourceAsMap.put("title", n_title);//将原来的字段用高亮字段替换掉

            }
            list.add(sourceAsMap);
        }
        return list;


    }




}

application.properties

server.port=9090
# 关闭thymeleaf的缓存
spring.thymeleaf.cache=false

新建一个文件夹，然后在这个文件夹里面使用cmd的命令 下载vue和axios

npm install vue
npm install axios

index.html

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

<head>
    <meta charset="utf-8"/>
    <title>狂神说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 type="submit" @click.prevent="searchKey" id="searchbtn">搜索</button>
                                    </div>
                                </fieldset>
                            </form>
                            <ul class="relKeyTop">
                                <li><a>狂神说Java</a></li>
                                <li><a>狂神说前端</a></li>
                                <li><a>狂神说Linux</a></li>
                                <li><a>狂神说大数据</a></li>
                                <li><a>狂神聊理财</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="#"> 狂神说 </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>{
  {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>
<!--前端使用vue, 实现前后端分离-->
<script th:src="@{/js/axios.min.js}"></script>
<script th:src="@{/js/vue.min.js}"></script>
<script>
    new Vue({
    
        el: '#app',
        data: {
    
            keyword: '', //搜索关键字
            results: [] //搜索的结果
        },
        methods: {
    
            searchKey(){
    
                var keyword = this.keyword;
                console.log(keyword);
                //对接后端的接口
                axios.get('search/' + keyword + "/1/20").then(response=>{
    
                    console.log(response);
                    this.results = response.data; //绑定数据
                })

            }
        }
    })

</script>

</body>
</html>

目录

B站学习网址：【狂神说Java】ElasticSearch7.6.x最新完整教程通俗易懂_哔哩哔哩 (゜-゜)つロ 干杯~-bilibili

转载：https://blog.csdn.net/doudoutj/article/details/117092131