NameValuePair和BasicNameValuePair的關係

NameValuePair

簡單名稱值對節點類型，多用於java像URL發送post請求，在發送Post請求的時候使用該list來存放參數；

BasicNameValuePair

BasicNameValuePair是實現了apache http的NameValuePair這個接口的類型；

例子：

String url="訪問網址";

HttpPost httppost=new HttpPost(url); //建立HttpPost對象

//建立一個NameValuePair數組，用於存儲傳送的數據

List<NameValuePair> params=new ArrayList<NameValuePair>();

//添加參數（這裏我們使用NameValuePair的實現類來創建對象）

params.add(new BasicNameValuePair("鍵","值"));

//設置編碼

httppost.setEntity(new UrlEncodedFormEntity(params,HTTP.UTF_8));

//發送1653Post,並返回一個HttpResponse對象

HttpResponse response=new DefaultHttpClient().execute(httppost);

實戰

public String httpPost(Map<String, String> requestParams, String urlEncode) {
        HttpPost httpPost = null;
        String resp = "";
        try {
            // 參數設置
            List<NameValuePair> params = new ArrayList<NameValuePair>();
            for (Map.Entry<String, String> entry : requestParams.entrySet()) {
                params.add(new BasicNameValuePair((String) entry.getKey(),
                        (String) entry.getValue()));
            }
 
            httpPost = new HttpPost(url);
            httpPost.setEntity(new UrlEncodedFormEntity(params, urlEncode));
            HttpResponse response = httpClient.execute(httpPost);
            int statusCode = response.getStatusLine().getStatusCode();
            if (statusCode != 200) 
            {
                return null;
            }
            HttpEntity httpEntity = response.getEntity();
            resp = EntityUtils.toString(httpEntity);
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (httpPost != null) {
                httpPost.abort();
            }
        }
        return resp;