使用HttpURLConnection添加自定义头部

import java.io.IOException;
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://www.example.com");
            
            // 打开连接
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            
            // 设置请求方法和其他属性
            connection.setRequestMethod("GET");
            connection.setConnectTimeout(5000);
            
            // 添加自定义头部
            connection.setRequestProperty("Authorization", "Bearer token");
            connection.setRequestProperty("User-Agent", "Mozilla/5.0");
            
            // 建立连接
            connection.connect();
            
            // 获取响应码
            int responseCode = connection.getResponseCode();
            System.out.println("Response Code: " + responseCode);
            
            // 关闭连接
            connection.disconnect();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}