Android 未设置HTTPUrlConnection中的HTTP POST数据？

我正在android中创建一个HTTPUrlConnection，并为如下所示的帖子做准备

urlConnection = (HttpURLConnection) url.openConnection();

urlConnection.setRequestProperty("content-type", "application/json");
byte [] encoded = Base64.encode((username+":"+password).getBytes("UTF-8"), Base64.DEFAULT); 
//Basic Authorization               
urlConnection.setRequestProperty("Authorization", "Basic "+ new String(encoded, "UTF-8"));
urlConnection.setDoInput(true);
urlConnection.setDoOutput(true);

//This gets implicitly set when DoOutput is True, but still let it be               
urlConnection.setRequestMethod("POST");

//Required for POST not to return 404 when used on with a host:port combination
//http://stackoverflow.com/questions/5379247/filenotfoundexception-while-getting-the-inputstream-object-from-httpurlconnectio
urlConnection.setRequestProperty("User-Agent","Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:17.0) Gecko/20100101 Firefox/17.0");
urlConnection.setRequestProperty("Accept","*/*");

然后准备JSON并将其写入连接的

OutputStream

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



outputStreamWriter = urlConnection.getOutputStream ();
outputStreamWriter.write(jsonObject.toString().getBytes());


finally {
    if (outputStreamWriter != null) try { outputStreamWriter.close(); } catch (IOException logOrIgnore) {}
            }

当我执行请求时，我的状态为500，因为我的服务器接收到一个无效json的空POST数据

---

这同样适用于web浏览器和curl。GET在android上使用相同的参数工作。我错过了什么？为POST请求设置参数的方式顺序有问题吗？

我能够让它正常工作。下面的代码片段

创建要发送的数据时，请注意所需的转义引号

List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(3);

nameValuePairs.add(new BasicNameValuePair("\A\"", "\"/api/v1/a/1/\""));

nameValuePairs.add(new BasicNameValuePair("\"B\"", "\"/api/v1/b/1/\""));

nameValuePairs.add(new BasicNameValuePair("\"C\"", "\"Hello from Android\""));

设置授权标头

String encoded = "Basic " + Base64.encodeToString((username+":"+password).getBytes("UTF-8"), Base64.URL_SAFE|Base64.NO_WRAP);

httppost.setHeader("Authorization",encoded);

将数据串起来，并将其设置为POST请求中的HTTP参数

StringEntity entity = new StringEntity(getQueryJSON(nameValuePairs));

httppost.setEntity(entity);

HttpResponse response = httpclient.execute(httppost);

if(response!=null){

InputStream in = response.getEntity().getContent(); //Get the data in the entity

readStream(in);

}

将JSON编码为字符串的实用函数 私有字符串getQueryJSON（列表参数）引发UnsupportedEncodingException

{

    StringBuilder result = new StringBuilder();

    boolean first = true;

    for (NameValuePair pair : params)

    {

    if (first){

        first = false;

        result.append("{");

    }else

        result.append(",");


    result.append(pair.getName());

    result.append(":");

    result.append(pair.getValue());


    }

    result.append("}");

    return result.toString();

}

---

您的服务器是否接收其余的请求？（身份验证，用户代理？@NiravRanpara-GET可以工作，POST不能工作，但由于数据问题而失败。我的清单中有INTERNET权限。您是否尝试刷新并记录在关闭或写入过程中可能收到的任何异常？（outputStreamWriter.write应位于try{}catch块中，是否记录异常？）

{

    StringBuilder result = new StringBuilder();

    boolean first = true;

    for (NameValuePair pair : params)

    {

    if (first){

        first = false;

        result.append("{");

    }else

        result.append(",");


    result.append(pair.getName());

    result.append(":");

    result.append(pair.getValue());


    }

    result.append("}");

    return result.toString();

}