JAVA HTTPPOST

public static String post(String url, Map<String, Object> paramMap) throws ClientProtocolException, IOException,Exception {
    HttpClient httpClient = HttpClientBuilder.create().build();
    HttpPost httpPost = new HttpPost(url);
    //设置认证信息
    JSONObject json=new JSONObject(paramMap);
    httpPost.setConfig(RequestConfig.custom().setConnectTimeout(5000).setConnectionRequestTimeout(3000).setSocketTimeout(5000).build());
    List<NameValuePair> formparams = setHttpParams(paramMap);
    UrlEncodedFormEntity param = new UrlEncodedFormEntity(formparams, "UTF-8");
    //通过setEntity()设置参数给post
    httpPost.setEntity(param);
    //利用httpClient的execute()方法发送请求并且获取返回参数
    HttpResponse response = httpClient.execute(httpPost);
    String httpEntityContent = getHttpEntityContent(response);
    httpPost.abort();
    return httpEntityContent;
}
/**
 * 设置请求参数
 * @param
 * @return
 */
private static List<NameValuePair> setHttpParams(Map<String, Object> paramMap) {
    List<NameValuePair> formparams = new ArrayList<>();
    Set<Map.Entry<String, Object>> set = paramMap.entrySet();
    for (Map.Entry<String, Object> entry : set) {
        formparams.add(new BasicNameValuePair(entry.getKey(), entry.getValue().toString()));
    }
    return formparams;
}

/**
 * 获得响应HTTP实体内容
 * @param response
 * @return
 * @throws java.io.IOException
 * @throws java.io.UnsupportedEncodingException
 */
private static String getHttpEntityContent(HttpResponse response) throws IOException, UnsupportedEncodingException {
    //通过HttpResponse 的getEntity()方法获取返回信息
    HttpEntity entity = response.getEntity();
    if (entity != null) {
        InputStream is = entity.getContent();
        BufferedReader br = new BufferedReader(new InputStreamReader(is, "UTF-8"));
        String line = br.readLine();
        StringBuilder sb = new StringBuilder();
        while (line != null) {
            sb.append(line + "\n");
            line = br.readLine();
        }
        br.close();
        is.close();
        return sb.toString();
    }
    return "";
}