다양한 Java 크롤러 프레임워크 비교: 목표 달성에 적합한 프레임워크는 무엇입니까?

import org.jsoup.Jsoup; import org.jsoup.nodes.Document; import org.jsoup.nodes.Element; import org.jsoup.select.Elements; public class JsoupSpider { public static void main(String[] args) throws Exception { // 发起HTTP请求，获取网页内容 Document doc = Jsoup.connect("https://example.com").get(); // 使用CSS选择器定位需要的元素 Elements links = doc.select("a[href]"); // 遍历并输出元素文本 for (Element link : links) { System.out.println(link.text()); } } }

import us.codecraft.webmagic.Spider; import us.codecraft.webmagic.processor.PageProcessor; import us.codecraft.webmagic.pipeline.Pipeline; public class WebMagicSpider { public static void main(String[] args) { // 创建爬虫，并设置URL、页面处理器和输出管道 Spider.create(new PageProcessor() { @Override public void process(Page page) { // TODO: 解析页面，提取需要的数据 } @Override public Site getSite() { return Site.me(); } }) .addUrl("https://example.com") .addPipeline(new Pipeline() { @Override public void process(ResultItems resultItems, Task task) { // TODO: 处理爬取结果，保存数据 } }) .run(); } }

import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.CloseableHttpClient; import org.apache.http.impl.client.HttpClients; import org.apache.http.util.EntityUtils; public class HttpClientSpider { public static void main(String[] args) throws Exception { // 创建HTTP客户端 CloseableHttpClient httpClient = HttpClients.createDefault(); // 创建HTTP GET请求 HttpGet httpGet = new HttpGet("https://example.com"); // 发送请求，获取响应 CloseableHttpResponse response = httpClient.execute(httpGet); // 提取响应内容 String content = EntityUtils.toString(response.getEntity(), "UTF-8"); // TODO: 解析响应内容，提取需要的数据 } }