HttpClient(用CloseableHttpClient發送get/post請求)


//get請求
private
String testGet() {
       //創建 CloseableHttpClient CloseableHttpClient httpClient
= HttpClients.createDefault(); CloseableHttpResponse response = null; String result = null; try { URIBuilder uri = new URIBuilder("請求路徑"); //get請求帶參數 List<NameValuePair> list = new LinkedList<>(); BasicNameValuePair param1 = new BasicNameValuePair("key1", "value1"); BasicNameValuePair param2 = new BasicNameValuePair("key2", "value2"); list.add(param1); list.add(param2); uri.setParameters(list); HttpGet httpGet = new HttpGet(uri.build());
         //設置請求狀態參數 RequestConfig requestConfig
= RequestConfig.custom()
              .setConnectionRequestTimeout(3000) .setSocketTimeout(3000)
              .setConnectTimeout(3000).build(); httpGet.setConfig(requestConfig); response = httpClient.execute(httpGet); int status = response.getStatusLine().getStatusCode();//獲取返回狀態值 if (status == HttpStatus.SC_OK) {//請求成功 HttpEntity httpEntity = response.getEntity(); if(httpEntity != null){ result = EntityUtils.toString(httpEntity, "UTF-8"); EntityUtils.consume(httpEntity);//關閉資源
               JSONObject jsonResult = JSONObject.fromObject(result);
            // JSONObject如下格式

            /*{
                        "data ": [
                                  {
                                      "name": "*",
                                      "value": "*",
                                  }
                              ],
                              "success ": true
                     }*/
              JSONArray jsonArray = jsonResult.getJSONArray("data");
              for (int i = 0; i < jsonArray.size(); i++) {//只取一個值返回
                result = jsonArray.getJSONObject(i).getString("對應key")
              } return result; } } } catch (Exception e) { e.printStackTrace(); } finally { if(response != null){ try { response.close(); } catch (IOException e) { e.printStackTrace(); } } if(httpClient != null){ try { httpClient.close(); } catch (IOException e) { e.printStackTrace(); } } } return result; }

 

//post請求
private void testPost(){
        HttpPost httpPost = new HttpPost("請求路徑");
        CloseableHttpClient client = HttpClients.createDefault();
        List params = new ArrayList();
        params.add(new BasicNameValuePair("key1", "value1"));
        params.add(new BasicNameValuePair("key2", "value2"));
        try {
        HttpEntity httpEntity = new UrlEncodedFormEntity(params, "UTF-8");
        httpPost.setEntity(httpEntity);
        response = client.execute(httpPost);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
           if(response != null){
               try {
                   response.close();
               } catch (IOException e) {
                   e.printStackTrace();
               }
           }
           if(client != null){
               try {
                   client.close();
               } catch (IOException e) {
                   e.printStackTrace();
               }
           }
        }
    }

 


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