Java中用爬虫进行解析的实例方法

<dependency>
<groupId>org.jsoup</groupId>
<artifactId>jsoup</artifactId>
<version>1.10.2</version>
</dependency>

Content.java
package com.asia.pojo;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@NoArgsConstructor
@AllArgsConstructor
public class Content {
 private String title;
 private String img;
 private String price;
}

HtmlParseUtil.java
package com.asia.utils;
import java.net.URL;
import java.net.URLDecoder;
import java.util.ArrayList;
import java.util.List;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
import com.asia.pojo.Content;
public class HtmlParseUtil {
public static void main(String[] args) throws Exception {
new HtmlParseUtil().parseJD("西瓜").forEach(System.out::println);
}
public List<Content> parseJD(String keywords) throws Exception {
String url = "https://search.jd.com/Search?keyword=" + URLDecoder.decode(keywords, "GBK");
// 解析网页.（Jsoup返回Document就是浏览器的Document对象）
Document document = Jsoup.parse((new URL(url)), 30000);
Element element = document.getElementById("J_goodsList");
Elements elements = element.getElementsByTag("li");
List<Content> list = new ArrayList<Content>();
for (Element el : elements) {
String src = el.getElementsByTag("img").eq(0).attr("data-lazy-img");
String price = el.getElementsByClass("p-price").eq(0).text();
String name = el.getElementsByClass("p-name").eq(0).text();
list.add(new Content(name, src, price));
}
return list;
}
}