java给对方接口传输json数据工具类

以下是一个使用 Java 的工具类，用于向对方接口传输 JSON 数据的示例：

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

public class HttpJsonUtils {

    public static String sendPostRequest(String url, String jsonInputString) {
        try {
            // 创建连接
            HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection();
            connection.setRequestMethod("POST");
            connection.setRequestProperty("Content-Type", "application/json");
            connection.setDoOutput(true);

            // 发送请求
            try (OutputStream outputStream = connection.getOutputStream()) {
                byte[] input = jsonInputString.getBytes("utf-8");
                outputStream.write(input, 0, input.length);
            }

            // 获取响应
            BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            StringBuilder response = new StringBuilder();
            String line;
            while ((line = reader.readLine()) != null) {
                response.append(line);
            }
            reader.close();

            // 关闭连接
            connection.disconnect();

            return response.toString();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

}

您可以使用上述工具类来发送 HTTP POST 请求并传输 JSON 数据。使用示例代码如下：

public class Main {

    public static void main(String[] args) {
        String url = "http://example.com/api/endpoint";
        String jsonInputString = "{\"name\":\"John\", \"age\":30, \"city\":\"New York\"}";

        String response = HttpJsonUtils.sendPostRequest(url, jsonInputString);
        System.out.println(response);
    }

}

确保将 `url` 替换为目标接口的实际 URL，