如何在 android 打开 URL 连接中将 Json 数组作为 post 参数发送

Question

我必须使用 Json 数组格式的有效载荷发出一个 post 请求。我正在使用开放的 HTTP URL 连接。我有代码可以使用 url 连接将 Json 对象作为 post 参数发送，但我不知道如何发送 json 数组。下面显示的是 json 对象的打开 url 发布请求的代码。谁能帮我发送 Json 数组而不是 json 对象？

 public String   sendPostRequest(String arg0, JSONObject postDataParams){

    try {

        URL url = new URL(arg0); // here is your URL path

        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setReadTimeout(15000 /* milliseconds */);
        conn.setConnectTimeout(15000 /* milliseconds */);
        conn.setRequestMethod("POST");
        conn.setRequestProperty("Accept", "application/json");
        conn.setRequestProperty("Authorization", "Bearer Key");
        conn.setRequestProperty("Content-Type", "application/json");

        conn.setDoInput(true);
        conn.setDoOutput(true);

        OutputStream os = conn.getOutputStream();

        BufferedWriter writer = new BufferedWriter(
                new OutputStreamWriter(os, "UTF-8"));
        writer.write(getPostDataString(postDataParams));
        writer.flush();
        writer.close();
        os.close();

        int responseCode=conn.getResponseCode();

        if (responseCode == HttpsURLConnection.HTTP_OK) {

            BufferedReader in=new BufferedReader(new
                    InputStreamReader(
                    conn.getInputStream()));

            StringBuffer sb = new StringBuffer("");
            String line="";

            while((line = in.readLine()) != null) {

                sb.append(line);
                break;
            }

            in.close();
            return sb.toString();

        }
        else {
            return new String("false : "+responseCode);
        }
    }
    catch(Exception e){
        return new String("Exception: " + e.getMessage());
    }

}


// converting json object to encoded string

public String getPostDataString(JSONObject params) throws Exception {

    StringBuilder result = new StringBuilder();
    boolean first = true;

    Iterator<String> itr = params.keys();

    while(itr.hasNext()){

        String key= itr.next();
        Object value = params.get(key);

        if (first)
            first = false;
        else
            result.append("&");

        result.append(URLEncoder.encode(key, "UTF-8"));
        result.append("=");
        result.append(URLEncoder.encode(value.toString(), "UTF-8"));

    }
    return result.toString();
}

这是我要发布的格式。

[
  {
     "name":"CHV",
     "serialNumber":"421",
     "mac":"00:0d:83:b1:c0:8e",

  },
  {
     "name":"CHV_0",
     "serialNumber":"431",
     "mac":"50:0d:83:b1:c0:8e",
     }
   ]

如何更改我的代码以发布 json 数组。

Answer 1

此示例供您参考

String request = "your Url Here";

URL url = new URL(request); 
HttpURLConnection connection = (HttpURLConnection) url.openConnection();   
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setInstanceFollowRedirects(false); 
connection.setRequestMethod("POST"); 
conn.setRequestProperty("Accept", "application/json");
conn.setRequestProperty("Authorization", "Bearer Key");
conn.setRequestProperty("Content-Type", "application/json");

DataOutputStream wr = new DataOutputStream(connection.getOutputStream ());
wr.writeBytes(otherParametersUrServiceNeed);


JSONArray jsonArray=new JSONArray();
JSONObject jsonParam = new JSONObject();
jsonParam.put("ID", "25");
jsonParam.put("description", "Real");
jsonParam.put("enable", "true");
jsonArray.put(jsonParam);

wr.writeBytes(jsonArray.toString());

wr.flush();
wr.close();

更多详情请查看here、here 或here