HttpClient的几种请求方式

public static String doPostToken(String tokenUrl,String clientId,String clientSecret,String grantType) {                  CloseableHttpResponse response = null;         String resultToken = "";         try {             //1.创建Httpclient对象             CloseableHttpClient httpClient = HttpClients.createDefault();                          //2.创建Http Post请求             HttpPost httpPost = new HttpPost(tokenUrl);                          //3.封装请求参数             List<BasicNameValuePair> list = new ArrayList<>();             list.add(new BasicNameValuePair("client_id", clientId));             list.add(new BasicNameValuePair("client_secret", clientSecret));             list.add(new BasicNameValuePair("grant_type", grantType));             httpPost.setEntity(new UrlEncodedFormEntity(list, "UTF-8"));                      //4.执行http请求             response = httpClient.execute(httpPost);             if(response.getStatusLine().getStatusCode() == HttpStatus.SC_OK ){                                  JSONObject jsonObject = JSONObject.fromObject(EntityUtils.toString(response.getEntity(), "utf-8"));                 resultToken = (String) Optional.ofNullable(jsonObject.get("access_token")).orElseGet(String::new);             }else{                 resultToken = "";             }         } catch (Exception e) {             LOG.error("post request get Token ERR XXXXXXXXXXXXXXXXX"+e);         }finally {             try {                 response.close();             } catch (IOException e) {                 LOG.error("post request get Token close ERR XXXXXXXXXXXXXXXXX"+e);             }         }         return resultToken;     }

来源：博客园

作者：硝烟漫过十八岁

链接：https://www.cnblogs.com/MrRightZhao/p/11642036.html