如何在Java中用HttpURLConnection获取Cookie？

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class HttpURLConnectionExample {
    public static void main(String[] args) {
        try {
            // 创建URL对象
            URL url = new URL("http://example.com");

            // 创建HttpURLConnection对象
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();

            // 设置请求方法为GET
            connection.setRequestMethod("GET");

            // 建立与服务器的连接
            connection.connect();

            // 获取服务器返回的Cookie
            String cookie = connection.getHeaderField("Set-Cookie");
            System.out.println("Cookie: " + cookie);

            // 获取服务器返回的数据
            InputStream inputStream = connection.getInputStream();
            BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
            String line;
            StringBuilder response = new StringBuilder();
            while ((line = reader.readLine()) != null) {
                response.append(line);
            }
            reader.close();

            // 打印服务器返回的数据
            System.out.println("Response: " + response.toString());

            // 断开与服务器的连接
            connection.disconnect();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}