如何在字符串缓冲区输入循环之外获得http请求的输入流结果

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

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

            // 打开URL连接
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();

            // 设置请求方法和其他请求头信息
            connection.setRequestMethod("GET");
            connection.setRequestProperty("User-Agent", "Mozilla/5.0");

            // 发送HTTP请求
            int responseCode = connection.getResponseCode();

            // 判断请求是否成功
            if (responseCode == HttpURLConnection.HTTP_OK) {
                // 获取输入流对象
                InputStream inputStream = connection.getInputStream();

                // 读取HTTP响应内容
                BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
                StringBuffer stringBuffer = new StringBuffer();
                String line;
                while ((line = reader.readLine()) != null) {
                    stringBuffer.append(line);
                }
                reader.close();

                // 输出结果
                System.out.println(stringBuffer.toString());
            } else {
                System.out.println("HTTP request failed with response code: " + responseCode);
            }

            // 关闭输入流和URL连接
            connection.disconnect();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}