Question

我正在尝试将 JSON数据发布到服务器。使用this page作为模板，因为它使用现代HttpURLConnection。

虽然我尝试了多种方式，但这只会返回实际页面的HTML帖子。它实际上并不将 JSON数据（作为字符串传递给方法）发布到页面。

我尝试将 JSON数据用作 JSONObject ，但DataOutputStream不喜欢这样。

我做错了吗？

HttpURLConnection conn;
DataOutputStream wr;
StringBuilder result;
URL urlObj;
JSONObject jObj = null;

public JSONObject makeHttpRequest(String data) {

    urlObj = new URL("MY URL HERE");

    conn = (HttpURLConnection) urlObj.openConnection();
    conn.setDoOutput(true);
    conn.setRequestMethod("POST");
    conn.setRequestProperty("Accept-Charset", "UTF-8");
    conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
    conn.setRequestProperty("Accept", "application/json");
    conn.setRequestProperty("Content-Length", ""+data.length());
    conn.setReadTimeout(10000);
    conn.setConnectTimeout(15000);
    conn.connect();

    wr = new DataOutputStream(conn.getOutputStream());
    wr.writeBytes(data);
    wr.flush();
    wr.close();


    //Receive the response from the server
    InputStream in = new BufferedInputStream(conn.getInputStream());
    BufferedReader reader = new BufferedReader(new InputStreamReader(in));
    result = new StringBuilder();
    String line;
    while ((line = reader.readLine()) != null) {
        result.append(line);
    }

    conn.disconnect();
    jObj = new JSONObject(result.toString());
    return jObj;
}

Answer 1

试试这段代码。它正在我的应用程序中工作。

public JSONObject getResponse(String data) {
    try {
        StringBuilder builder = new StringBuilder();
        URL url = new URL(requestURL);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setReadTimeout(15000);
        conn.setConnectTimeout(15000);
        conn.setRequestMethod("POST");
        conn.setDoInput(true);
        conn.setDoOutput(true);
        OutputStream os = conn.getOutputStream();
        BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(os, "UTF-8"));
        writer.write(data);
        writer.flush();
        writer.close();
        os.close();
        int responseCode=conn.getResponseCode();
        if (responseCode == HttpsURLConnection.HTTP_OK) {
            String line;
            BufferedReader br=new BufferedReader(new InputStreamReader(conn.getInputStream()));
            while ((line=br.readLine()) != null) {
                builder.append(line);
            }
        } else {
            builder.append("{status: \"Unable to connect to server.\"}");
        }
        Log.e("JSONService.java", builder.toString());
        JSONObject object = new JSONObject(builder.toString());
        return object;
    } catch (Exception ex) {
        Log.e("JSONService.java", Log.getStackTraceString(ex));
        try {
            object.put(STATUS, "Exception " +  ex.getMessage());
        } catch (Exception e) {
            Log.e("JSONService.java", Log.getStackTraceString(ex));
        }
    }
    return null;
}

JAVA POST方法不会POST到页面

1 个答案: