java發送get請求

String result = "";
        String location = "";
        BufferedReader in = null;
        try {
            String url3 = "https://xxx.xxx.com/v3/geocode/geo?key=xxxxxxxxxx";
            String param1 = URLEncoder.encode(address, "UTF-8");
            String param2 = URLEncoder.encode(city, "UTF-8");
            String urlNameString = url3 + "&address=" + param1 + "&city=" + param2;
            URL realUrl = new URL(urlNameString);
            // 打開和URL之間的連接
            URLConnection connection = realUrl.openConnection();
            // 建立實際的連接
            connection.connect();
            // 定義 BufferedReader輸入流來讀取URL的響應
            in = new BufferedReader(new InputStreamReader(
                    connection.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }


        } catch (Exception e) {
            System.out.println("發送GET請求出現異常！" + e);
            e.printStackTrace();
        }
        // 使用finally塊來關閉輸入流
        finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (Exception e2) {
                e2.printStackTrace();
            }
        }