如何使用NameValuePair使用POST向HttpURLConnection添加参数

时间：2012-03-19 09:45:48

标签： android post http-post httpurlconnection basicnamevaluepair

我正在尝试使用HttpURLConnection执行 POST （我需要以这种方式使用它，不能使用HttpPost）并且我想添加参数那个连接，如

post.setEntity(new UrlEncodedFormEntity(nvp));

，其中

nvp = new ArrayList<NameValuePair>();

存储了一些数据。我无法找到如何将此ArrayList添加到我的HttpURLConnection的方法：

HttpsURLConnection https = (HttpsURLConnection) url.openConnection();
https.setHostnameVerifier(DO_NOT_VERIFY);
http = https;
http.setRequestMethod("POST");
http.setDoInput(true);
http.setDoOutput(true);

这种尴尬的https和http组合的原因是需要不验证证书。但这不是问题，它可以很好地发布服务器。但是我需要用论据发帖。

有什么想法吗？

重复免责声明：

早在2012年，我不知道如何将参数插入到 HTTP POST 请求中。我挂在NameValuePair上，因为它在教程中。这个问题可能看似重复，但是，我的2012年自我阅读 other 问题，使用NameValuePair NOT 。事实上，它并没有解决我的问题。

16 个答案:

答案 0 :(得分：347)

您可以获取连接的输出流并将参数查询字符串写入其中。

URL url = new URL("http://yoururl.com");
HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
conn.setReadTimeout(10000);
conn.setConnectTimeout(15000);
conn.setRequestMethod("POST");
conn.setDoInput(true);
conn.setDoOutput(true);

List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("firstParam", paramValue1));
params.add(new BasicNameValuePair("secondParam", paramValue2));
params.add(new BasicNameValuePair("thirdParam", paramValue3));

OutputStream os = conn.getOutputStream();
BufferedWriter writer = new BufferedWriter(
        new OutputStreamWriter(os, "UTF-8"));
writer.write(getQuery(params));
writer.flush();
writer.close();
os.close();

conn.connect();

... 

private String getQuery(List<NameValuePair> params) throws UnsupportedEncodingException
{
    StringBuilder result = new StringBuilder();
    boolean first = true;

    for (NameValuePair pair : params)
    {
        if (first)
            first = false;
        else
            result.append("&");

        result.append(URLEncoder.encode(pair.getName(), "UTF-8"));
        result.append("=");
        result.append(URLEncoder.encode(pair.getValue(), "UTF-8"));
    }

    return result.toString();
}

答案 1 :(得分：181)

因为不推荐使用NameValuePair。想分享我的代码

public String  performPostCall(String requestURL,
            HashMap<String, String> postDataParams) {

        URL url;
        String response = "";
        try {
            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(getPostDataString(postDataParams));

            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) {
                    response+=line;
                }
            }
            else {
                response="";

            }
        } catch (Exception e) {
            e.printStackTrace();
        }

        return response;
    }

... 

  private String getPostDataString(HashMap<String, String> params) throws UnsupportedEncodingException{
        StringBuilder result = new StringBuilder();
        boolean first = true;
        for(Map.Entry<String, String> entry : params.entrySet()){
            if (first)
                first = false;
            else
                result.append("&");

            result.append(URLEncoder.encode(entry.getKey(), "UTF-8"));
            result.append("=");
            result.append(URLEncoder.encode(entry.getValue(), "UTF-8"));
        }

        return result.toString();
    }

答案 2 :(得分：151)

如果您不需要ArrayList<NameValuePair>参数，这是使用Uri.Builder类构建查询字符串的较短解决方案：

URL url = new URL("http://yoururl.com");
HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
conn.setReadTimeout(10000);
conn.setConnectTimeout(15000);
conn.setRequestMethod("POST");
conn.setDoInput(true);
conn.setDoOutput(true);

Uri.Builder builder = new Uri.Builder()
        .appendQueryParameter("firstParam", paramValue1)
        .appendQueryParameter("secondParam", paramValue2)
        .appendQueryParameter("thirdParam", paramValue3);
String query = builder.build().getEncodedQuery();

OutputStream os = conn.getOutputStream();
BufferedWriter writer = new BufferedWriter(
            new OutputStreamWriter(os, "UTF-8"));
writer.write(query);
writer.flush();
writer.close();
os.close();

conn.connect();

答案 3 :(得分：25)

一种解决方案是创建自己的params字符串。

这是我用于最新项目的实际方法。您需要将args从hashtable更改为namevaluepair：

private static String getPostParamString(Hashtable<String, String> params) {
    if(params.size() == 0)
        return "";

    StringBuffer buf = new StringBuffer();
    Enumeration<String> keys = params.keys();
    while(keys.hasMoreElements()) {
        buf.append(buf.length() == 0 ? "" : "&");
        String key = keys.nextElement();
        buf.append(key).append("=").append(params.get(key));
    }
    return buf.toString();
}

张贴参数：

OutputStreamWriter writer = new OutputStreamWriter(conn.getOutputStream());
writer.write(getPostParamString(req.getPostParams()));

答案 4 :(得分：14)

我想我找到了你需要的东西。它可以帮助别人。

您可以使用方法 UrlEncodedFormEntity.writeTo（OutputStream）。

UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(nvp); 
http.connect();

OutputStream output = null;
try {
  output = http.getOutputStream();    
  formEntity.writeTo(output);
} finally {
 if (output != null) try { output.close(); } catch (IOException ioe) {}
}

答案 5 :(得分：13)

接受的答案在以下位置抛出ProtocolException：

OutputStream os = conn.getOutputStream();

因为它不启用URLConnection对象的输出。解决方案应包括：

conn.setDoOutput(true);

让它发挥作用。

答案 6 :(得分：12)

如果还不晚，我想分享我的代码

<强> Utils.java： 

inplace

<强> MainActivity.java： 

True

答案 7 :(得分：8)

使用PrintWriter的方法更简单（参见here）

基本上你只需要：

// set up URL connection
URL urlToRequest = new URL(urlStr);
HttpURLConnection urlConnection = (HttpURLConnection)urlToRequest.openConnection();
urlConnection.setDoOutput(true);
urlConnection.setRequestMethod("POST");
urlConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

// write out form parameters
String postParamaters = "param1=value1&param2=value2"
urlConnection.setFixedLengthStreamingMode(postParameters.getBytes().length);
PrintWriter out = new PrintWriter(urlConnection.getOutputStream());
out.print(postParameters);
out.close();

// connect
urlConnection.connect();

答案 8 :(得分：4)

AsyncTask通过JSONObect方法

以POST方式发送数据 
public class PostMethodDemo extends AsyncTask<String , Void ,String> {
        String server_response;

        @Override
        protected String doInBackground(String... strings) {
            URL url;
            HttpURLConnection urlConnection = null;

            try {
                url = new URL(strings[0]);
                urlConnection = (HttpURLConnection) url.openConnection();
                urlConnection.setDoOutput(true);
                urlConnection.setDoInput(true);
                urlConnection.setRequestMethod("POST");

                DataOutputStream wr = new DataOutputStream(urlConnection.getOutputStream ());

                try {
                    JSONObject obj = new JSONObject();
                    obj.put("key1" , "value1");
                    obj.put("key2" , "value2");

                    wr.writeBytes(obj.toString());
                    Log.e("JSON Input", obj.toString());
                    wr.flush();
                    wr.close();
                } catch (JSONException ex) {
                    ex.printStackTrace();
                }
                urlConnection.connect();

                int responseCode = urlConnection.getResponseCode();

                if(responseCode == HttpURLConnection.HTTP_OK){
                    server_response = readStream(urlConnection.getInputStream());
                }

            } catch (MalformedURLException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return null;
        }

        @Override
        protected void onPostExecute(String s) {
            super.onPostExecute(s);
            Log.e("Response", "" + server_response);
        }
    }

    public static String readStream(InputStream in) {
        BufferedReader reader = null;
        StringBuffer response = new StringBuffer();
        try {
            reader = new BufferedReader(new InputStreamReader(in));
            String line = "";
            while ((line = reader.readLine()) != null) {
                response.append(line);
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (reader != null) {
                try {
                    reader.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return response.toString();
    }

答案 9 :(得分：3)

试试这个：

HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("your url");
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(3);
nameValuePairs.add(new BasicNameValuePair("user_name", "Name"));
nameValuePairs.add(new BasicNameValuePair("pass","Password" ));
nameValuePairs.add(new BasicNameValuePair("user_email","email" ));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

// Execute HTTP Post Request
HttpResponse response = httpclient.execute(httppost);

String ret = EntityUtils.toString(response.getEntity());
Log.v("Util response", ret);

您可以根据需要添加任意数量的nameValuePairs。别忘了在列表中提及计数。

答案 10 :(得分：1)

通过使用org.apache.http.client.HttpClient，您可以通过以下更易读的方式轻松完成此操作。

HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://www.yoursite.com/script.php");

在try catch中你可以插入

// Add your data
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
nameValuePairs.add(new BasicNameValuePair("id", "12345"));
nameValuePairs.add(new BasicNameValuePair("stringdata", "AndDev is Cool!"));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

// Execute HTTP Post Request
HttpResponse response = httpclient.execute(httppost);

答案 11 :(得分：1)

要使用自定义标头或json数据调用POST / PUT / DELETE / GET Restful方法，可以使用以下异步类

public class HttpUrlConnectionUtlity extends AsyncTask<Integer, Void, String> {
private static final String TAG = "HttpUrlConnectionUtlity";
Context mContext;
public static final int GET_METHOD = 0,
        POST_METHOD = 1,
        PUT_METHOD = 2,
        HEAD_METHOD = 3,
        DELETE_METHOD = 4,
        TRACE_METHOD = 5,
        OPTIONS_METHOD = 6;
HashMap<String, String> headerMap;

String entityString;
String url;
int requestType = -1;
final String timeOut = "TIMED_OUT";

int TIME_OUT = 60 * 1000;

public HttpUrlConnectionUtlity (Context mContext) {
    this.mContext = mContext;
    this.callback = callback;
}

@Override
protected void onPreExecute() {
    super.onPreExecute();
}

@Override
protected String doInBackground(Integer... params) {
    int requestType = getRequestType();
    String response = "";
    try {


        URL url = getUrl();
        HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();

        urlConnection = setRequestMethod(urlConnection, requestType);
        urlConnection.setConnectTimeout(TIME_OUT);
        urlConnection.setReadTimeout(TIME_OUT);
        urlConnection.setDoOutput(true);
        urlConnection = setHeaderData(urlConnection);
        urlConnection = setEntity(urlConnection);

        if (urlConnection.getResponseCode() == HttpURLConnection.HTTP_OK) {
            response = readResponseStream(urlConnection.getInputStream());
            Logger.v(TAG, response);
        }
        urlConnection.disconnect();
        return response;


    } catch (ProtocolException e) {
        e.printStackTrace();
    } catch (SocketTimeoutException e) {
        return timeOut;
    } catch (IOException e) {
        e.printStackTrace();
    } catch (IllegalStateException e) {
        Logger.e(TAG, "ALREADY CONNECTED");
    }
    return response;
}

@Override
protected void onPostExecute(String response) {
    super.onPostExecute(response);

    if (TextUtils.isEmpty(response)) {
        //empty response
    } else if (response != null && response.equals(timeOut)) {
        //request timed out 
    } else    {
    //process your response
   }
}


private String getEntityString() {
    return entityString;
}

public void setEntityString(String s) {
    this.entityString = s;
}

private String readResponseStream(InputStream in) {
    BufferedReader reader = null;
    StringBuffer response = new StringBuffer();
    try {
        reader = new BufferedReader(new InputStreamReader(in));
        String line = "";
        while ((line = reader.readLine()) != null) {
            response.append(line);
        }
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        if (reader != null) {
            try {
                reader.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
    return response.toString();
}

private HttpURLConnection setEntity(HttpURLConnection urlConnection) throws IOException {
    if (getEntityString() != null) {
        OutputStream outputStream = urlConnection.getOutputStream();
        BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8"));
        writer.write(getEntityString());
        writer.flush();
        writer.close();
        outputStream.close();
    } else {
        Logger.w(TAG, "NO ENTITY DATA TO APPEND ||NO ENTITY DATA TO APPEND ||NO ENTITY DATA TO APPEND");
    }
    return urlConnection;
}

private HttpURLConnection setHeaderData(HttpURLConnection urlConnection) throws UnsupportedEncodingException {
    urlConnection.setRequestProperty("Content-Type", "application/json");
    urlConnection.setRequestProperty("Accept", "application/json");
    if (getHeaderMap() != null) {
        for (Map.Entry<String, String> entry : getHeaderMap().entrySet()) {
            urlConnection.setRequestProperty(entry.getKey(), entry.getValue());
        }
    } else {
        Logger.w(TAG, "NO HEADER DATA TO APPEND ||NO HEADER DATA TO APPEND ||NO HEADER DATA TO APPEND");
    }
    return urlConnection;
}

private HttpURLConnection setRequestMethod(HttpURLConnection urlConnection, int requestMethod) {
    try {
        switch (requestMethod) {
            case GET_METHOD:
                urlConnection.setRequestMethod("GET");
                break;
            case POST_METHOD:
                urlConnection.setRequestMethod("POST");
                break;
            case PUT_METHOD:
                urlConnection.setRequestMethod("PUT");
                break;
            case DELETE_METHOD:
                urlConnection.setRequestMethod("DELETE");
                break;
            case OPTIONS_METHOD:
                urlConnection.setRequestMethod("OPTIONS");
                break;
            case HEAD_METHOD:
                urlConnection.setRequestMethod("HEAD");
                break;
            case TRACE_METHOD:
                urlConnection.setRequestMethod("TRACE");
                break;
        }
    } catch (ProtocolException e) {
        e.printStackTrace();
    }
    return urlConnection;
}

public int getRequestType() {
    return requestType;
}

public void setRequestType(int requestType) {
    this.requestType = requestType;
}

public URL getUrl() throws MalformedURLException {
    return new URL(url);
}

public void setUrl(String url) {
    this.url = url;
}

public HashMap<String, String> getHeaderMap() {
    return headerMap;
}

public void setHeaderMap(HashMap<String, String> headerMap) {
    this.headerMap = headerMap;
}   }

用法是

    HttpUrlConnectionUtlity httpMethod = new HttpUrlConnectionUtlity (mContext);
    JSONObject jsonEntity = new JSONObject();

    try {
        jsonEntity.put("key1", value1);
        jsonEntity.put("key2", value2);

    } catch (JSONException e) {
        e.printStackTrace();
    }
    httpMethod.setUrl(YOUR_URL_STRING);
    HashMap<String, String> headerMap = new HashMap<>();
    headerMap.put("key",value);
    headerMap.put("key1",value1);
    httpMethod.setHeaderMap(headerMap);
    httpMethod.setRequestType(WiseConnectHttpMethod.POST_METHOD); //specify POST/GET/DELETE/PUT
    httpMethod.setEntityString(jsonEntity.toString());
    httpMethod.execute();

答案 12 :(得分：0)

我使用这样的东西：

SchemeRegistry sR = new SchemeRegistry();
sR.register(new Scheme("https", SSLSocketFactory.getSocketFactory(), 443));

HttpParams params = new BasicHttpParams();
SingleClientConnManager mgr = new SingleClientConnManager(params, sR);

HttpClient httpclient = new DefaultHttpClient(mgr, params);

HttpPost httppost = new HttpPost(url);
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

HttpResponse response = httpclient.execute(httppost);

答案 13 :(得分：0)

在我的情况下，我创建了这样的函数来生成Post请求，它接受String url和参数的hashmap 

 public  String postRequest( String mainUrl,HashMap<String,String> parameterList)
{
    String response="";
    try {
        URL url = new URL(mainUrl);

        StringBuilder postData = new StringBuilder();
        for (Map.Entry<String, String> param : parameterList.entrySet())
        {
            if (postData.length() != 0) postData.append('&');
            postData.append(URLEncoder.encode(param.getKey(), "UTF-8"));
            postData.append('=');
            postData.append(URLEncoder.encode(String.valueOf(param.getValue()), "UTF-8"));
        }

        byte[] postDataBytes = postData.toString().getBytes("UTF-8");




        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setRequestMethod("POST");
        conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
        conn.setRequestProperty("Content-Length", String.valueOf(postDataBytes.length));
        conn.setDoOutput(true);
        conn.getOutputStream().write(postDataBytes);

        Reader in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"));

        StringBuilder sb = new StringBuilder();
        for (int c; (c = in.read()) >= 0; )
            sb.append((char) c);
        response = sb.toString();


    return  response;
    }catch (Exception excep){
        excep.printStackTrace();}
    return response;
}

答案 14 :(得分：0)

参数到 HttpURLConnection （使用 POST ）和 NameValuePair 和 OutPut 

        try {
        URL url = new URL("https://yourUrl.com");
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();

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

        conn.setRequestMethod("POST");

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

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

        OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
        wr.write(data.toString());
        wr.flush();
        wr.close();

        BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
        String inputLine;
        StringBuffer response = new StringBuffer();

        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();
        System.out.println(response.toString());
    } catch (MalformedURLException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } catch (JSONException e) {
        e.printStackTrace();
    }

答案 15 :(得分：-2)

JSONObject params = new JSONObject();
try {
   params.put(key, val);
}catch (JSONException e){
   e.printStackTrace();
}

这就是我通过POST传递＆＃34; params＆＃34;（JSONObject）的方法

connection.getOutputStream().write(params.toString().getBytes("UTF-8"));
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