如何从服务器下载 JSON 的示例？

Posted 2023-03-31

【中文标题】如何从服务器下载 JSON 的示例？

【英文标题】：Example of how to download JSON from server?

【发布时间】：2010-08-26 18:48:06

【问题描述】：

有没有一个很好的例子来说明如何查询服务器和下载响应（JSON 或 XML）？

【参考方案1】：

这应该可以解决问题

String JsonResponse = HttpHelper.connect(SERVER_URL);
JSONObject json=new JSONObject(JsonResponse);

private static String convertStreamToString(InputStream is) 
        /*
         * To convert the InputStream to String we use the BufferedReader.readLine()
         * method. We iterate until the BufferedReader return null which means
         * there's no more data to read. Each line will appended to a StringBuilder
         * and returned as String.
         */
        BufferedReader reader = new BufferedReader(new InputStreamReader(is));
        StringBuilder sb = new StringBuilder();

        String line = null;
        try 
            while ((line = reader.readLine()) != null) 
                sb.append(line + "\n");
            
         catch (IOException e) 
            e.printStackTrace();
         finally 
            try 
                is.close();
             catch (IOException e) 
                e.printStackTrace();
            
        
        return sb.toString();
    
    public static String connect(String url)
    
        HttpClient httpclient = new DefaultHttpClient();
        HttpGet httpget = new HttpGet(url); 
        HttpResponse response;
        try 
            response = httpclient.execute(httpget);
            //Log.i(TAG,response.getStatusLine().toString());
            HttpEntity entity = response.getEntity();
            if (entity != null) 
                InputStream instream = entity.getContent();
                String result= convertStreamToString(instream);
                instream.close();
                return result;
            
         catch (ClientProtocolException e) 
         catch (IOException e) 
        
        return null;