Java中使用HTTP阻塞式调用服务器API

    public String requestRefresh(String token, String clusterName){
        String result = null;
        try{
            // 打开和URL之间的连接
            URL url = new URL(URL_Refresh_Couchbase_Cluster);
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setDoOutput(true);
            connection.setDoInput(true);
            connection.setUseCaches(false);
            connection.setRequestMethod("GET");
            connection.setRequestProperty("content-type", "application/x-www-form-urlencoded");
            OutputStreamWriter out = new OutputStreamWriter(connection.getOutputStream(),"UTF-8");
            // 把数据写入请求的Body
            out.write("token=" + token + "&cluster=" + clusterName); //参数形式跟在地址栏的一样
            out.flush();
            out.close();
            // 获取数据,将返回的输入流转换成字符串
            InputStream inputStream = connection.getInputStream();
            InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
            BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
            result = bufferedReader.readLine();
            // 释放资源
            bufferedReader.close();
            inputStreamReader.close();
            inputStream.close();
            connection.disconnect();
        }catch (Exception e){
            log.info("(requestRefresh) sending GET Request to refresh mysql databse has exception : {}", e);
            e.printStackTrace();
        }
        return result;
    }