java发送get请求

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);
            // 打开和URL之间的连接
            URLConnection connection = realUrl.openConnection();
            // 建立实际的连接
            connection.connect();
            // 定义 BufferedReader输入流来读取URL的响应
            in = new BufferedReader(new InputStreamReader(
                    connection.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }


        } catch (Exception e) {
            System.out.println("发送GET请求出现异常！" + e);
            e.printStackTrace();
        }
        // 使用finally块来关闭输入流
        finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (Exception e2) {
                e2.printStackTrace();
            }
        }