url獲取數據

public String markets(HttpServletRequest request){
        String result="";//訪問返回結果
        BufferedReader read=null;//讀取訪問結果
        JSONObject jsonObject=null;
         JSONArray jsonArray=null;
         List<Market> marketList=new ArrayList<Market>();
           try {
            //建立url
            URL realurl=new URL("http://192.168.0.52:1999/GdpeWebStock/QuoteListResource?rownum=9999");
            //打開鏈接
            URLConnection connection=realurl.openConnection();
            // 設置通用的請求屬性
            connection.setRequestProperty("accept", "*/*");
            connection.setRequestProperty("connection", "Keep-Alive");
            connection.setRequestProperty("user-agent","Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            //創建鏈接
            connection.connect();
            /*// 獲取全部響應頭字段
             Map<String, List<String>> map = connection.getHeaderFields();
             // 遍歷全部的響應頭字段，獲取到cookies等
             for (String key : map.keySet()) {
                 System.out.println(key + "--->" + map.get(key));
             }*/
             // 定義 BufferedReader輸入流來讀取URL的響應
             read = new BufferedReader(new InputStreamReader(
                     connection.getInputStream(),"UTF-8"));
             String line;//循環讀取
             while ((line = read.readLine()) != null) {
                 result += line;
             }
             jsonObject=new JSONObject(result.toString());
             jsonArray=jsonObject.getJSONArray("data");
             /*
              * 遍歷jsonArray
              */
             for(int i=0;i<jsonArray.length();i++){
                 JSONObject ob=jsonArray.getJSONObject(i);
                 Market market=new Market();
                 String[] names=JSONObject.getNames(ob);
                 for(String name:names){
                     BeanUtils.copyProperty(market, name, ob.get(name));
                 }
                 marketList.add(market);
             }
           } catch (IOException e) {
            e.printStackTrace();
           } catch (IllegalAccessException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (JSONException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }finally{
            if(read!=null){//關閉流
             try {
              read.close();
             } catch (IOException e) {
              e.printStackTrace();
             }
            }
           }
           request.setAttribute("marketList", marketList);
        return "forward:/page/web/market.jsp";
    }