如何在java中发送http get请求并获取特定字段

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

public class HttpGetRequest {
    public static void main(String[] args) {
        try {
            // 创建URL对象
            URL url = new URL("http://example.com/api/data"); // 替换为实际的API地址

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

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

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

            // 检查响应代码
            if (responseCode == HttpURLConnection.HTTP_OK) {
                // 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();

                // 解析响应内容，获取特定字段
                String specificField = parseResponse(response.toString());

                // 输出特定字段的值
                System.out.println("特定字段的值：" + specificField);
            } else {
                System.out.println("请求失败，响应代码：" + responseCode);
            }

            // 关闭连接
            connection.disconnect();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private static String parseResponse(String response) {
        // 在这里解析响应内容，获取特定字段的值
        // 返回特定字段的值
        return "特定字段的值";
    }
}