121.【ElasticSearch伪京东搜索】（一）

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.5.5</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.jsxs</groupId>
    <artifactId>Jsxs-es-JD</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>Jsxs-es-JD</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
        <!--    自己定义es版本依赖，保证和本地一致    -->
        <elasticsearch.version>7.6.2</elasticsearch.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-elasticsearch</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <version>2.7.9</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!--   引入我们的JSON包     -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>2.0.26</version>
        </dependency>
        <!--      引入Thymeleaf启动器  -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
            <version>2.7.7</version>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

<!--        jsoup解析网页-->
<dependency>
    <groupId>org.jsoup</groupId>
    <artifactId>jsoup</artifactId>
    <version>1.10.2</version>
</dependency>

package com.jsxs.pojo;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
/**
 * @Author Jsxs
 * @Date 2023/6/30 13:06
 * @PackageName:com.jsxs.pojo
 * @ClassName: Content
 * @Description: TODO
 * @Version 1.0
 */
@Data
@NoArgsConstructor
@AllArgsConstructor
public class Content {
    private String title;
    private String img;
    private String price;
}

package com.jsxs.utils;
import com.jsxs.pojo.Content;
import org.elasticsearch.common.recycler.Recycler;
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.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
/**
 * @Author Jsxs
 * @Date 2023/6/30 12:40
 * @PackageName:com.jsxs.utils
 * @ClassName: HtmlParseUtil
 * @Description: TODO
 * @Version 1.0
 */
@Component
public class HtmlParseUtil {
    public List<Content> parseJD(String keywords) throws Exception {
        // 1.获得请求
        String url = "https://search.jd.com/Search?keyword="+keywords;
        // 2.解析网页 返回的document对象就是浏览器的Document对象
        Document document = Jsoup.parse(new URL(url), 3000);
        // 3.利用js的Document对象进行操作  ->获取商品整个html页面
        Element element = document.getElementById("J_goodsList");
        // 4.获取所有的li元素 是一个集合。
        Elements elements = element.getElementsByTag("li");
        // 创建一个链表,用于存放我们爬取到的信息
        ArrayList<Content> contents = new ArrayList<>();
        // 5.获取元素中的各个内容
        for (Element li : elements) {
            // 获取图片  这里面加上attr目的是懒加载。
            String img = li.getElementsByTag("img").eq(0).attr("data-lazy-img"); // 爬取懒加载的图片
            // 获取价格
            String price = li.getElementsByClass("p-price").eq(0).text();
            // 获取上坪的价格
            String title = li.getElementsByClass("p-name").eq(0).text();
            // 存放我们爬取到的信息
            contents.add(new Content(title,img,price));
        }
        return contents;
    }
    public static void main(String[] args) throws Exception {
        for (Content java : new HtmlParseUtil().parseJD("码出高效")) {
            System.out.println(java);
        }
    }
}