java通过URL读取json数据

打开URL，读流：

 

public static String loadJson (String url) {
        StringBuilder json = new StringBuilder();
        try {
            URL urlObject = new URL(url);
            URLConnection uc = urlObject.openConnection();
            BufferedReader in = new BufferedReader(new InputStreamReader(uc.getInputStream()));
            String inputLine = null;
            while ( (inputLine = in.readLine()) != null) {
                json.append(inputLine);
            }
            in.close();
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return json.toString();
    }

main方法测试：

 

 

public static void main(String[] args) {
        String url = "http://api.map.baidu.com/telematics/v3/weather?location=%E6%88%90%E9%83%BD&output=json&ak=rnm8udmHdWaHFWZTO2tuTiG8";
//        String url = "http://www.kuaidi100.com/query?type=yunda&postid=1201386764793";
        String json = loadJson(url);
        System.out.println(json);
    }