从Android发送JSON对象到HttpURLConnection POST请求

JSONObject jsonObject = new JSONObject();
jsonObject.put("key1", "value1");
jsonObject.put("key2", "value2");

String jsonStr = jsonObject.toString();

URL url = new URL("http://example.com/api");

HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("POST");

connection.setRequestProperty("Content-Type", "application/json");

connection.setDoOutput(true);
OutputStream outputStream = connection.getOutputStream();
outputStream.write(jsonStr.getBytes("UTF-8"));
outputStream.close();

int responseCode = connection.getResponseCode();
if (responseCode == HttpURLConnection.HTTP_OK) {
    // 请求成功，读取响应数据
    InputStream inputStream = connection.getInputStream();
    // 处理响应数据
    inputStream.close();
} else {
    // 请求失败，处理错误信息
}