401 HttpURLConnection发送带有自定义头部的POST的响应代码

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;

public class HttpPostExample {
    public static void main(String[] args) throws IOException {
        // 设置请求URL
        URL url = new URL("http://example.com/api/endpoint");

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

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

        // 设置自定义头部
        connection.setRequestProperty("Custom-Header", "value");

        // 允许输出请求内容
        connection.setDoOutput(true);

        // 构建请求体
        String requestBody = "param1=value1&param2=value2";

        // 发送请求体
        try (OutputStream outputStream = connection.getOutputStream()) {
            outputStream.write(requestBody.getBytes());
            outputStream.flush();
        }

        // 获取响应代码
        int responseCode = connection.getResponseCode();

        // 处理响应
        if (responseCode == HttpURLConnection.HTTP_OK) {
            // 响应成功，读取响应内容
            BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String line;
            StringBuilder response = new StringBuilder();
            while ((line = reader.readLine()) != null) {
                response.append(line);
            }
            reader.close();

            // 处理响应内容
            System.out.println("Response: " + response.toString());
        } else if (responseCode == HttpURLConnection.HTTP_UNAUTHORIZED) {
            // 未授权错误，需要进行身份验证或权限不足
            System.out.println("Unauthorized. Please check your credentials or permissions.");
        } else {
            // 其他错误
            System.out.println("Error. Response Code: " + responseCode);
        }

        // 关闭连接
        connection.disconnect();
    }
}