public class HttpRequestUtils {

    private static final int connectTimeout = 1000 * 60;/* 连接超时时间 */     private static final int socketTimeout = 1000 * 180;/* 读取数据超时时间 */      /**      * 向指定 URL 发送POST方法的请求      *      * @param url      *            发送请求的 URL      * @param param      *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。      * @return 所代表远程资源的响应结果      */ public static String sendPost(String urlStr, String content) {     URL url = null;     HttpURLConnection connection = null;     try {         url = new URL(urlStr);         connection = (HttpURLConnection) url.openConnection();         connection.setDoOutput(true);         connection.setDoInput(true);         connection.setRequestMethod("POST");         connection.setUseCaches(false);         connection.setRequestProperty("Accept", "application/json"); // 设置接收数据的格式          connection.setRequestProperty("Content-Type", "application/json"); // 设置发送数据的格式          connection.connect();         OutputStreamWriter out = new OutputStreamWriter(connection.getOutputStream(), "UTF-8"); // utf-8编码          out.append(content);          out.flush();          out.close();

        BufferedReader reader = new BufferedReader(new InputStreamReader(

                connection.getInputStream(), "utf-8"));

        StringBuffer buffer = new StringBuffer();

        String line = "";         while ((line = reader.readLine()) != null) {             buffer.append(line);         }         reader.close();         String result = buffer.toString();         return result;     } catch (IOException e) {         e.printStackTrace();     } finally {         if (connection != null) {             connection.disconnect();         }     }     return null; }

/** HttpClientPost */

public static String doPost(String url, List<BasicNameValuePair> params, StringBuilder sb) {     /* 创建HttpClinet实例 */     CloseableHttpClient client = HttpClients.createDefault();     /* 设置请求和传输超时时间 */     RequestConfig config = RequestConfig.custom().setConnectTimeout(connectTimeout).setSocketTimeout(socketTimeout).build();     sb.append("地址:" + url);     System.out.println("地址：" + url);     /* 创建Post方法实例 */     HttpPost post = new HttpPost(url);     post.setConfig(config);     HttpEntity entity;     StringBuffer result = new StringBuffer();     long startTime = 0, endTime = 0;     try {         if (params != null) {/* 设置参数 */             entity = new UrlEncodedFormEntity(params, "UTF-8");             post.setEntity(entity);             System.out.println("参数：" + EntityUtils.toString(entity));         }         startTime = System.nanoTime();         CloseableHttpResponse response = client.execute(post);         int code = response.getStatusLine().getStatusCode();         System.out.println("状态码：" + code);         if (code == 200 || code == 500) {             try {                 entity = response.getEntity();                 if (entity != null) {                     long len = entity.getContentLength();                     if (len != -1 && len < 2048) {/* 当返回值长度较小的时候，使用工具类 */                         result.append(EntityUtils.toString(entity));                     } else {/* 否则使用IO流来读取 */                         BufferedReader reader = new BufferedReader(new InputStreamReader(entity.getContent(), "UTF-8"));                         String line;                         while ((line = reader.readLine()) != null) {                             result.append(line);                         }                         reader.close();                     }                     endTime = System.nanoTime();                     sb.append("返回:" + result.toString());                     System.out.println("返回：" + result.toString());                 }             } catch (Exception e) {                 endTime = System.nanoTime();                 sb.append("通讯错误：" + e.getMessage());             } finally {                 response.close();             }         } else {             endTime = System.nanoTime();             post.abort();             sb.append("错误请求！状态码:" + code);         }     } catch (IOException e) {         endTime = System.nanoTime();         sb.append("通讯时发生异常：" + e.getMessage());     } finally {         try {             client.close();         } catch (IOException e) {         }     }     System.out.println("用时：" + (endTime - startTime) / 1000000L + "毫秒");     return result.toString(); } }