Android：网络：获取JSON格式数据

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public class News {
   private Integer id;
   private String title;
   private Integer timelength;

...

}

ListView listView = (ListView) this.findViewById(R.id.listView);

        try {
           List<News> videos = VideoNewsService.getJSONLastNews();//需修改成你本机的Http请求路径
           List<HashMap<String, Object>> data = new ArrayList<HashMap<String,Object>>();
           for(News news : videos){
               HashMap<String, Object> item = new HashMap<String, Object>();
               item.put("id", news.getId());
               item.put("title", news.getTitle());
               item.put("timelength", getResources().getString(R.string.timelength)
                       + news.getTimelength()+ getResources().getString(R.string.min));
               data.add(item);
           }
           SimpleAdapter adapter = new SimpleAdapter(this, data, R.layout.item,
                   new String[]{"title", "timelength"}, new int[]{R.id.title, R.id.timelength});

listView.setAdapter(adapter);

public static List<News> getJSONLastNews() throws Exception{
       String path = "http://192.168.0.168:8080/web/ListServlet";
       URL url = new URL(path);
       HttpURLConnection conn = (HttpURLConnection) url.openConnection();
       conn.setConnectTimeout(5000);
       conn.setRequestMethod("GET");
       if(conn.getResponseCode() == 200){
           InputStream inStream = conn.getInputStream();
           return parseJSON(inStream);
       }
       return null;
   }
   /**
   * 解析JSON数据
   * @param inStream
   * @return
   */
   private static List<News> parseJSON(InputStream inStream) throws Exception{
       List<News> newses = new ArrayList<News>();
       byte[] data = StreamTool.read(inStream);
       String json = new String(data);
       JSONArray array = new JSONArray(json);
       for(int i = 0 ; i < array.length() ; i++){
           JSONObject jsonObject = array.getJSONObject(i);
           News news = new News(jsonObject.getInt("id"), jsonObject.getString("title"), jsonObject.getInt("timelength"));
           newses.add(news);
       }
       return newses;
   }

Servlet：

List<News> videos = service.getLastNews();

// [{id:56,title:"xxxxx",timelength:90},{id:16,title:"xbbx",timelength:20}]
           StringBuilder builder = new StringBuilder();
           builder.append('[');
           for(News news : videos){
               builder.append('{');
               builder.append("id:").append(news.getId()).append(',');
               builder.append("title:\"").append(news.getTitle()).append("\",");
               builder.append("timelength:").append(news.getTimelength());
               builder.append("},");
           }
           builder.deleteCharAt(builder.length() - 1);
           builder.append(']');
           request.setAttribute("json", builder.toString());
           request.getRequestDispatcher("/WEB-INF/page/jsonvideonews.jsp").forward(request, response);

JSP：

<%@ page language="java" contentType="text/plain; charset=UTF-8" pageEncoding="UTF-8"%>${json}

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