java通过URL读取json数据

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);  

    }