POST获取数据和json解析

POST获取数据 

    StringBuffer buffer=new StringBuffer();

        try {
            String url="http://v.juhe.cn/toutiao/index";
            String params="key=22a108244dbb8d1f49967cd74a0c144d&type=yule";
            URL urll=new URL(url);
            //建立http上的连接
            HttpURLConnection connection= (HttpURLConnection) urll.openConnection();

            connection.setRequestMethod("POST");//post请求
            DataOutputStream das=new DataOutputStream(connection.getOutputStream());
            das.writeBytes(params);//写入
            das.flush();//刷新
            das.close();//关闭
            //连接
            connection.connect();

            if(200==connection.getResponseCode()){
                InputStream inputstream=connection.getInputStream();
                BufferedReader br=new BufferedReader(new InputStreamReader(inputstream));
                String line=null;
                while((line=br.readLine()) != null){
                    buffer.append(line);
                }
                return  buffer.toString();
            }

        } catch (Exception e) {
            e.printStackTrace();
        }

        return null;

  //解析数据
    private void jx(String result) {
        try {
            JSONObject obj=new JSONObject(result);
            JSONObject res=obj.optJSONObject("result");
            JSONArray data=res.optJSONArray("data");
            for (int i = 0; i <data.length() ; i++) {
                JSONObject dataobj= (JSONObject) data.get(i);
                    News n=new News();
                n.author_name=dataobj.optString("author_name");
                n.date=dataobj.optString("date");
                n.title=dataobj.optString("title");
                list.add(n);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

        //遍历集合,存入数据库
        if(list!=null){
            for (int i = 0; i <list.size(); i++) {
                    News n=list.get(i);
                System.out.println(n.title+"n.title"+n.author_name+"n.author_name"+n.date+"n.date");
                add(n.title,n.author_name,n.date);
            }
        }