一、傳送json

    public void test() throws IOException {
        //引數封裝------------------------------------------------------
        Map<String, Object> jsonMap = new HashMap<String, Object>();
        Map<String, Object> params1 = new HashMap<String, Object>();
        List<Object> params2=new
 
 ArrayList<>();
        //封裝params1
        //封裝params2
        //封裝jsonMap
        jsonMap.put("sendBasic", params1);
        jsonMap.put("toUsers", params2);
        String json = JSON.toJSONString(jsonMap);
        //---建立連線---------------------------------------------------------------
        URL url = new
 
 URL("http://");//請求的路徑
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setDoInput(true); // 設定可輸入
        connection.setDoOutput(true); // 設定該連線是可以輸出的
        connection.setRequestMethod("POST");// 設定請求方式
        connection.setRequestProperty("Charset", "UTF-8");
        connection.setRequestProperty(
 
"Accept-Charset", "utf-8");
        connection.setRequestProperty("Content-Type", "application/json;charset=utf-8");

        //傳送引數---------------------------------------------------------------------------
        BufferedOutputStream pw = new BufferedOutputStream(connection.getOutputStream());
        //傳送內容轉碼utf-8 **必寫**
        pw.write(json.getBytes("UTF-8"));
        pw.flush();
        pw.close();
        //讀取響應資料---------------------------------------------------------------------------
        //輸入流轉碼utf-8  **必寫**
        BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));
        String line = null;
        StringBuilder result = new StringBuilder();
        while ((line = br.readLine()) != null) { // 讀取資料
            result.append(line + "\n");
        }
    }