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
<dependency>
<groupId>com.alibabagroupId>
<artifactId>fastjsonartifactId>
<version>1.2.75version>
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
<dependency>
<groupId>org.jsoupgroupId>
<artifactId>jsoupartifactId>
<version>1.13.1version>
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 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("");
highlightBuilder.postTags("");
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
<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 ">
<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" 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Javaa>li>
<li><a>狂神说前端a>li>
<li><a>狂神说Linuxa>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>
<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="#"> 狂神说 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">
<div class="productImg-wrap">
<a class="productImg">
<img :src="result.img">
a>
div>
<p class="productPrice">
<em>{
{result.price}}em>
p>
<p class="productTitle">
<a v-html="result.title">a>
p>
<div class="productShop">
<span>店铺： 狂神说Java span>
div>
<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 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