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);
}