java爬取页面的案例怎么带Cookie

您好，关于您的问题，可以使用 Java 的 HttpURLConnection 类来进行网页爬取，并在请求中设置 Cookie。 具体代码如下： ```java import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.URL; import java.util.List; import java.util.Map; public class JavaSpiderDemo { public static void main(String[] args) { String url = "https://www.example.com"; String cookie = "cookie1=value1; cookie2=value2; cookie3=value3";//设置Cookie try { URL obj = new URL(url); HttpURLConnection httpConn = (HttpURLConnection) obj.openConnection(); httpConn.setRequestMethod("GET"); httpConn.setRequestProperty("Cookie", cookie);//设置请求中的Cookie int responseCode = httpConn.getResponseCode(); if (responseCode == HttpURLConnection.HTTP_OK) { BufferedReader in = new BufferedReader(new InputStreamReader(httpConn.getInputStream())); String inputLine; StringBuilder response = new StringBuilder(); while ((inputLine = in.readLine()) != null) { response.append(inputLine); } in.close(); System.out.println("Response：" + response.toString()); //获取响应头 Map<String, List<String>> headerFields = httpConn.getHeaderFields(); for (String key : headerFields.keySet()) { System.out.println(key + "：" + headerFields.get(key)); } } else { System.out.println("GET request not worked"); } } catch (IOException e) { e.printStackTrace(); } } } ``` 如上代码所示，只需在请求的 Header 中设置 Cookie 即可带上 Cookie 进行网页爬取。同时，我们还可以在代码中添加响应头的获取，获取网页返回的响应头信息。 希望以上回答能够解决您的问题。如有任何疑问，欢迎继续追问！