1.感受

      服务器端的Servlet先将数据封装成JSON格式，通过IO中的PrintWriter，write出。



2.服务器端实现（Servlet） 


 

List list;    
          //将list转成json格式（需要导入jar包）
          JSONObject json=new JSONObject();
                // 转成  jsonarray
          JSONArray jsonArray=json.getJSONArray("list");
          response.setContentType("text/plain");
          PrintWriter pw=response.getWriter();
          pw.write(jsonArray.toString());
          pw.flush();
          pw.close();


3.Android端

 （1）. 还是通过Httpclient来请求数据。（HttpResponse ）

 

  这里的 path是上面servlet地址。

public String getrubbishIfo(String path) {
               //网络请求
                StringBuilder sb = new StringBuilder();
                HttpClient httpclient = new DefaultHttpClient();
                HttpResponse httpResponse;
              try {
                httpResponse = httpclient.execute(new HttpGet(path));
                HttpEntity entity = httpResponse.getEntity();             if (entity != null) {
    BufferedReader reader = new BufferedReader( new InputStreamReader(entity.getContent(), "UTF-     8"), 8192);
     String line = null;
     while ((line = reader.readLine()) != null) {
      sb.append(line + "\n");
     }
     reader.close();
    } } catch (ClientProtocolException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   } catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   } return sb.toString();
  }


（2）JSON解析

    

String body = client.getrubbishIfo(path);
    //将数据转成JSONArray，通过循环得到对应的数据
      JSONArray array = new JSONArray(body);
      for (int i = array.length()-1; i >=0; i--) {
       Map list = new HashMap();
       JSONObject obj = array.getJSONObject(i);

    

 （3）通过以上两部就可完成对数据的获取