JSON格式：

JSONObject jsonObject = new JSONObject();
        jsonObject.put("Action", "action");
        jsonObject.put("UserId","11");
        jsonObject.put("MsgID", "msgid");

private static String send(NameValuePair[] data,String address)throws Exception{
        HttpPost httpPost = new HttpPost(address);
        CloseableHttpClient client = HttpClients.createDefault();
        StringEntity entity = new StringEntity(jsonObject.toString(),"utf-8");//解決中文亂碼問題    
        entity.setContentEncoding("UTF-8");    
        entity.setContentType("application/json");    
        httpPost.setEntity(entity);
        String respContent = null;
        HttpResponse resp = client.execute(httpPost);
        if(resp.getStatusLine().getStatusCode() == 200) {
           HttpEntity he = resp.getEntity();
           respContent = EntityUtils.toString(he,"UTF-8");
        }
        return respContent;
    }

表單格式：

 NameValuePair[] data = {
                 new NameValuePair("accesskey", "1111"),
                 new NameValuePair("secret", "2222"),
                 new NameValuePair("mobiles", "3333")
         };

private static String send(NameValuePair[] data,String address)throws Exception{
        HttpClient httpClient = new HttpClient();
        PostMethod postMethod = new PostMethod(address);
        postMethod.getParams().setContentCharset("UTF-8");
        postMethod.getParams().setParameter(HttpMethodParams.RETRY_HANDLER,new DefaultHttpMethodRetryHandler());
        
        postMethod.setRequestBody(data);
        postMethod.setRequestHeader("Connection", "close");
        
        int statusCode = httpClient.executeMethod(postMethod);
        System.out.println("statusCode: " + statusCode + ", body: "
                    + postMethod.getResponseBodyAsString());
        byte[] bytes = postMethod.getResponseBody();
        String json = new String(bytes);
        return json;
    }