如何在java中进行HTTP post登录请求时获取cookie并发布

import java.net.HttpURLConnection;
import java.net.URL;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.util.List;
import java.util.Map;

String url = "登录URL";
URL obj = new URL(url);
HttpURLConnection con = (HttpURLConnection) obj.openConnection();

// 设置请求方法为POST
con.setRequestMethod("POST");

// 设置请求头部属性
con.setRequestProperty("User-Agent", "Mozilla/5.0");
con.setRequestProperty("Accept-Language", "en-US,en;q=0.5");

// 构建请求参数（用户名、密码等）
String urlParameters = "username=myUsername&password=myPassword";

// 发送POST请求
con.setDoOutput(true);
OutputStream os = con.getOutputStream();
os.write(urlParameters.getBytes());
os.flush();
os.close();

int responseCode = con.getResponseCode();

if (responseCode == HttpURLConnection.HTTP_OK) { // 请求成功
    // 读取响应内容
    BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
    String inputLine;
    StringBuilder response = new StringBuilder();

    while ((inputLine = in.readLine()) != null) {
        response.append(inputLine);
    }
    in.close();

    // 获取响应头部中的cookie
    Map<String, List<String>> headerFields = con.getHeaderFields();
    List<String> cookiesHeader = headerFields.get("Set-Cookie");
    if (cookiesHeader != null) {
        for (String cookie : cookiesHeader) {
            // 发布cookie
            System.out.println("Cookie: " + cookie);
        }
    }

    // 处理响应内容
    System.out.println("Response: " + response.toString());
} else {
    System.out.println("POST请求失败");
}