SpringBoot中使用Jsoup爬取网站数据的方法

爬取数据

导入jar包

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

  <dependencies>
    <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>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-data-redis</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-data-elasticsearch</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-thymeleaf</artifactId>
    </dependency>
    <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.springframework.boot</groupId>
      <artifactId>spring-boot-configuration-processor</artifactId>
      <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-test</artifactId>
      <scope>test</scope>
      <exclusions>
        <exclusion>
          <groupId>org.junit.vintage</groupId>
          <artifactId>junit-vintage-engine</artifactId>
        </exclusion>
      </exclusions>
    </dependency>
  </dependencies>

新建实体类

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

编写爬虫工具类

public class HtmlParseUtil {
  public static void main(String[] args) throws Exception {
    new HtmlParseUtil().parseDDJJ("包").forEach(System.out::println);
  }

  public List<Content> parseDDJJ(String keywords) throws Exception {
    //爬取url地址
    String url = "https://search.xxxx.com/Search?keyword="+keywords;
    //解析网页，30s内未爬取成功，打印错误
    Document document = Jsoup.parse(new URL(url),30000);
    //获取每一本书籍的id
    Element element = document.getElementById("DJ_goodsList");
    //获取所有的li标签
    Elements elements = element.getElementsByTag("li");

    ArrayList<Content> goodsList = new ArrayList<>();

    //遍历li标签的内容
    for (Element el : elements) {
      String img = el.getElementsByTag("img").eq(0).attr("src");
      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;
  }
}

可以看到内容、图片、价格系数爬取

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