httpclient使用，待完善

public static void main(String[] args) throws ClientProtocolException, IOException, InvalidKeyException, NoSuchAlgorithmException {

          HttpClient httpclient = new DefaultHttpClient();

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

          list.add(new BasicNameValuePair("bill_id","06757487"));

          list.add(new BasicNameValuePair("status","paid"));

          list.add(new BasicNameValuePair("error","0"));

          list.add(new BasicNameValuePair("user","123"));

          Map<String,String> map = new HashMap<String, String>();

          map.put("bill_id","06757487");

          map.put("status","paid");

          map.put("error","0");

          map.put("user","123");

          String src = generateSignString(map);

          String sign = DigestUtil.getHAMC_SHA1Signature(src, "SNVDTLDHTBDNLYV");

          HttpPost post = new HttpPost("http://localhost:8082/lcpay_notify/qiwiNotify");

             post.setHeader("Accept", "application/xml");

             post.setHeader("Content-Type", "application/x-www-form-urlencoded;charset=utf-8");

             post.setHeader("X-Api-Signature",sign);

             UrlEncodedFormEntity formEntity = null;

             formEntity = new UrlEncodedFormEntity(list, "utf-8");

             post.setEntity(formEntity);

             // 发起交易

             HttpResponse resp = httpclient.execute(post);

             HttpEntity entity = resp.getEntity();

             BufferedReader br = new BufferedReader(new InputStreamReader(entity.getContent(), "UTF-8"));

             StringBuffer responseString = new StringBuffer();

             String result = br.readLine();

             while (result != null) {

                 responseString.append(result);

                 result = br.readLine();

             }

             System.out.println(responseString);