Java网络请求api

public void httpRequest(String path){
        try {
            //创建一个URL对象
            URL url = new URL(path);
            //获取URL连接，open方法返回一个URLConnection类的对象
            URLConnection conn = url.openConnection();
            //从连接获取输入流
            InputStream in = conn.getInputStream();
            InputStreamReader is = new InputStreamReader(in);
            //将字节流转换成字符流
            BufferedReader br = new BufferedReader(is);
            StringBuilder sb = new StringBuilder();
            String line = null;
            while((line = br.readLine())!=null) {
                sb.append(line);
            }
            String backStr=sb.toString();
            //将String转为JSON数据
            JSONObject result = new JSONObject(backStr);
            int code = result.getInt("code");
            System.out.println(code);
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (JSONException e) {
            e.printStackTrace();
        }
    }