ElasticSearch仿京东搜索
1.新建项目框架，导入依赖前端素材
<dependencies>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-data-elasticsearchartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-thymeleafartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
<dependency>
<groupId>org.jsoupgroupId>
<artifactId>jsoupartifactId>
<version>1.11.2version>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-devtoolsartifactId>
<scope>runtimescope>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-devtoolsartifactId>
<scope>runtimescope>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-configuration-processorartifactId>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>fastjsonartifactId>
<version>1.2.74version>
dependency>
dependencies>
项目结构：
2.配置文件中定义访问接口
server.port=9090
spring.thymeleaf.cache=false
编写控制层
@Controller
public class IndexController {
@RequestMapping({"/","/index"})
public String index(){
return "index";
}
}
访问页面测试
3.爬取网页数据
新建工具类和实体类，工具类用于爬取网页的数据，实体类用于存储爬取到的数据。
@Data
@NoArgsConstructor
@AllArgsConstructor
public class PaperContent {
private String img;
private String price;
private String title;
}
首先我们需要查看网页的前台结构
编写爬取网页的工具类，对比网页前端的网页结构来编写代码
public List<PaperContent> parseHtmlElement(String keyWord) throws Exception {
List<PaperContent> paperContents=new ArrayList<>();
//keyword用于需要查询的关键字
String url="http://search.jd.com/Search?keyword="+keyWord;
Document document = Jsoup.parse(new URL(url), 30000);
//根据id获取文档
Element element = document.getElementById("J_goodsList");
// System.out.println(element);
//获取标签
Elements elements = element.getElementsByTag("li");
// System.out.println(elements);
//获取元素内容，这里el就是就是标签
for (Element el:elements) {
PaperContent paperContent=new PaperContent();
//获取li标签中的图片信息
//图片是通过懒加载的，并不是直接通过src来获取的
String img = el.getElementsByTag("img").eq(0).attr("data-lazy-img");
//获取li标签中的价格信息
String price = el.getElementsByClass("p-price").eq(0).text();
//获取li标签中的书名信息
String title = el.getElementsByClass("p-name").eq(0).text();
System.out.println("===============================");
System.out.println(img);
System.out.println(price);
System.out.println(title);
paperContent.setImg(img);
paperContent.setPrice(price);
paperContent.setTitle(title);
paperContents.add(paperContent);
}
return paperContents;
}
测试:
public static void main(String[] args) throws Exception {
new PageParse().parseHtmlElement("java").forEach(System.out::println);
}
后台查看是否爬取到数据：
4.将爬取到的数据放入ElasticSearch中
编写配置类，连接本地Elasticsearch
@Configuration
public class ElasticSearchConfig {
@Bean
public RestHighLevelClient restHighLevelClient(){
RestHighLevelClient client=new RestHighLevelClient(
RestClient.builder(new HttpHost("127.0.0.1",9200,"http"))
);
return client;
}
}
编写Service层，将爬取到的数据放入ElasticSearch中前提是索引存在。
@Autowired
private RestHighLevelClient restHighLevelClient;
//解析数据放到elasticSearch
public Boolean parseContent(String keyword) throws Exception {
//查询到的数据
List<PaperContent> paperContents = new PageParse().parseHtmlElement(keyword);
BulkRequest bulkRequest=new BulkRequest();
bulkRequest.timeout("2m");
//将查询到的数据放入容器中
for (int i = 0; i < paperContents.size(); i++) {
bulkRequest.add(new IndexRequest("jd_commodity")
.source(JSON.toJSONString(paperContents.get(i)), XContentType.JSON));
}
//将请求中大哥数据放入ElasticSearch(批量插入)
BulkResponse bulk = restHighLevelClient.bulk(bulkRequest, RequestOptions.DEFAULT);
return !bulk.hasFailures();
}
编写controller层，与前端结合
@RequestMapping("/parse/{keyword}")
public Boolean pushElk(@PathVariable("keyword") String keyword) throws Exception {
return jdService.parseContent(keyword);
}
访问地址运行测试：
查看elasticsearch是否已经存在数据
5.将ElasticSearch中的数据显示到前端页面
//从elasticSearch中获取数据并且高亮显示
public List<Map<String,Object>> getContent(String keyword,int pageNo,int pageSize) throws IOException {
if (pageNo<=1){
pageNo=1;
}
//条件搜索
SearchRequest searchRequest=new SearchRequest("jd_commodity");
SearchSourceBuilder searchSourceBuilder=new SearchSourceBuilder();
//分页
searchSourceBuilder.from(pageNo);
searchSourceBuilder.size(pageSize);
//精准查询
TermQueryBuilder termQueryBuilder= QueryBuilders.termQuery("title",keyword);
searchSourceBuilder.query(termQueryBuilder);
searchSourceBuilder.timeout(new TimeValue(60, TimeUnit.SECONDS));
searchRequest.source(searchSourceBuilder);
SearchResponse searchs = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
//解析结果
List<Map<String,Object>> list=new ArrayList<>();
for (SearchHit hit:searchs.getHits().getHits()) {
list.add(hit.getSourceAsMap());
}
return list;
}
contoller层调用方法
@RequestMapping("/parse/{keyword}/{pageNo}/{pageSize}")
public List<Map<String,Object>> getElk(@PathVariable("keyword") String keyword,
@PathVariable("pageNo") int pageNo,
@PathVariable("pageSize") int pageSize) throws IOException {
return jdService.getContent(keyword, pageNo, pageSize);
}
访问设置的地址访问
与前端结合：
（html代码）
DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="utf-8"/>
<title>ElasticSearch仿京东实战title>
<link rel="stylesheet" th:href="@{/css/style.css}"/>
<script th:src="@{/js/jquery.min.js}">script>
head>
<body class="pg">
<div class="page">
<div id="app" class=" mallist tmall- page-not-market ">
<div id="header" class=" header-list-app">
<div class="headerLayout">
<div class="headerCon ">
<h1 id="mallLogo">
<img th:src="@{/images/jdlogo.png}" alt="">
h1>
<div class="header-extra">
<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" 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>Javaa>li>
<li><a>前端a>li>
<li><a>Linuxa>li>
<li><a>大数据a>li>
<li><a>ElasticSearcha>li>
ul>
div>
div>
div>
div>
div>
<div id="content">
<div class="main">
<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="#"> 王说 a>li>
<li><a href="#"> Java a>li>
ul>
div>
div>
div>
div>
form>
<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>
<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 v-text="result.price">em>
p>
<!–标题–>
<p class="productTitle">
<a v-html="result.title">a>
p>
<!– 店铺名 –>
<div class="productShop">
<span v-text="result.shopnum">span>
div>
<!– 成交信息 –>
<p class="productStatus">
<span>月成交<em>999笔em>span>
<span>评价 <a>3a>span>
p>
div>
div>
div>
div>
div>
div>
div>
<script src="https://unpkg.com/axios/dist/axios.min.js">script>
<script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js">script>
<script>
new Vue({
el: "#app",
data: {
"keyword": '', // 搜索的关键字
"results": [] // 后端返回的结果
},
methods: {
searchKey() {
var keyword = this.keyword;
console.log(keyword);
// axios.get('searchHighLight/' + keyword + '/0/20').then(response => {
axios.get('parse/' + keyword + '/0/20').then(response => {
console.log(response);
this.results = response.data;
})
}
}
});
script>
body>
html>
测试：
可以检索出相关数据
高亮设置
高亮：设置高亮字段，替换原来的字段
向读取内容的方法中添加以下代码，
测试：
完成。