HttpClient使用之模拟post及get请求

客官°小女子只卖身不卖艺 2021-12-12 13:29 310阅读 0赞

## 整理http工具类方便以后进行http通信 ##

**get请求**

/** * get请求 * * @param url * @param uid * @param token * @return * @throws IOException */
        public static String doGet(String url, Long uid, String token) { 
            // 创建Httpclient对象
            CloseableHttpClient httpclient = HttpClients.createDefault();
            // 创建get请求对象
            HttpGet httpGet = new HttpGet(url);
            //设置必要的请求头参数
            if (!ObjectUtils.isEmpty(uid)) { 
                httpGet.addHeader("uid", uid.toString());
            }
            if (!StringUtils.isEmpty(token)) { 
                httpGet.addHeader("accessToken", token);
            }
    
    
            CloseableHttpResponse response = null;
            String content = null;
            try { 
                response = httpclient.execute(httpGet);
                //当请求成功后获得回复数据
                if (response.getStatusLine().getStatusCode() == 200) { 
                
                    content = EntityUtils.toString(response.getEntity(), "UTF-8");
                    System.out.println(content);
                }
            } catch (Exception e) { 
                //打印错误日志信息
                log.error(e.getMessage());
            } finally { 
                if (response != null) { 
                    try { 
                    //关闭流
                        response.close();
                        httpclient.close();
                    } catch (IOException e) { 
                        log.error(e.getMessage());
                    }
                }
            }
            return content;
        }

**post请求**

/** * @Title: doPost * @Description: application/x-www-form-urlencoded编码方式带参数和请求头的POST请求 * @param: url * @param: param * @param: header * @Date: 2019-05-27 15:27 * @return: java.lang.String * @throws: */
        public static String doPost(String url, Map<String, Object> param, Map<String, Object> header) { 
            // 创建Httpclient对象
            CloseableHttpClient httpClient = HttpClients.createDefault();
            CloseableHttpResponse response = null;
            String resultString = "";
            try { 
                // 创建Http Post请求
                HttpPost httpPost = new HttpPost(url);
                if (header != null) { 
                	//遍历请求头参数列表，将其放入请求头中
                    for (String key : header.keySet()) { 
                        httpPost.setHeader(key, header.get(key).toString());
                    }
                }
    
                // 创建参数列表
                if (param != null) { 
                    List<NameValuePair> paramList = new ArrayList();
                    for (String key : param.keySet()) { 
                        paramList.add(new BasicNameValuePair(key, param.get(key).toString()));
                    }
                    // 模拟表单
                    UrlEncodedFormEntity entity = new UrlEncodedFormEntity(paramList, "utf-8");
                    httpPost.setEntity(entity);
                }
                // 执行http请求
                response = httpClient.execute(httpPost);
                resultString = EntityUtils.toString(response.getEntity(), "utf-8");
            } catch (Exception e) { 
                e.printStackTrace();
            } finally { 
                try { 
                    response.close();
                } catch (IOException e) { 
                    e.printStackTrace();
                }
            }
    
            return resultString;
        }