学习记录：java 请求接口获取返回的json信息中json数据保存至list集合

首先将以下需要的包导入

gson-2.8.0.jar
commons-beanutils-1.8.0.jar
commons-collections-3.2.1.jar
commons-lang-2.4.jar
commons-logging.jar
ezmorph-1.0.6.jar

 

附上下载地址链接：https://pan.baidu.com/s/1z5gOjYrzNNXJNYdMosI0yA  提取码：6732 
贴上代码

package music;

import com.google.gson.JsonArray;
/**
 * Created by david on 2017-7-5.
 */
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.List;
import net.sf.json.JsonConfig; 
public class paihang {
    /**
     * 发起http请求并获取结果
     * @param requestUrl 请求地址
     */
    public static JSONObject getXpath(String requestUrl){
        String res="";
        JSONObject object = null;
        StringBuffer buffer = new StringBuffer();
        try{
            URL url = new URL(requestUrl);
            HttpURLConnection urlCon= (HttpURLConnection)url.openConnection();
            if(200==urlCon.getResponseCode()){
                InputStream is = urlCon.getInputStream();
                InputStreamReader isr = new InputStreamReader(is,"utf-8");
                BufferedReader br = new BufferedReader(isr);

                String str = null;
                while((str = br.readLine())!=null){
                    buffer.append(str);
                }
                br.close();
                isr.close();
                is.close();
                res = buffer.toString();
                //JsonParser parse =new JsonParser();
                object = JSONObject.fromObject(res);
                return object;
                    }
        }catch(IOException e){
            e.printStackTrace();
        }
        //return object;
        return null;
    }

   public static JsonObject postDownloadJson(String path,String post){
        URL url = null;
        try {
            url = new URL(path);
            HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
            httpURLConnection.setRequestMethod("POST");// 提交模式
            // conn.setConnectTimeout(10000);//连接超时 单位毫秒
            // conn.setReadTimeout(2000);//读取超时 单位毫秒
            // 发送POST请求必须设置如下两行
            httpURLConnection.setDoOutput(true);
            httpURLConnection.setDoInput(true);
            // 获取URLConnection对象对应的输出流
            PrintWriter printWriter = new PrintWriter(httpURLConnection.getOutputStream());
            // 发送请求参数
            printWriter.write(post);//post的参数 xx=xx&yy=yy
            // flush输出流的缓冲
            printWriter.flush();
            //开始获取数据
            BufferedInputStream bis = new            BufferedInputStream(httpURLConnection.getInputStream());
            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            int len;
            byte[] arr = new byte[1024];
            while((len=bis.read(arr))!= -1){
                bos.write(arr,0,len);
                bos.flush();
            }
            bos.close();
            JsonParser parse = new JsonParser();
            return (JsonObject)parse.parse(bos.toString("utf-8"));
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    //测试
    public static void main(String args [] ) {
    	System.out.println("开始啦");
          //获取返回json对象
    	  JSONObject object = getXpath("https://api.bzqll.com/music/netease/songList?key=579621905&id=3778678&limit=10&offset=0");
    	  /**
    	   * {"result":"SUCCESS",
    	   *       "code":200,
    	   *       "data":
    	   *       {
    	   *           "songListId":"3778678",
    	   *           "songListName":"云音乐热歌榜",
    	   *           "songListPic":"https://p2.music.126.net/GhhuF6Ep5Tq9IEvLsyCN7w==/18708190348409091.jpg?param=300y300","songListCount":200,"songListPlayCount":2880181248,"songListDescription":"云音乐热歌榜：云音乐用户一周内收听所有线上歌曲 官方TOP排行榜，每周四更新。","songListUserId":1,
    	   *           "songs":
    	   *           [
    	   *               {"id":"574566207",
    	   *                 "name":"盗将行","
    	   *                 singer":"花粥/马雨阳",
    	   *                 "pic":"https://api.bzqll.com/music/netease/pic?id=574566207&imgSize=300&key=579621905",
    	   *                 "lrc":"https://api.bzqll.com/music/netease/lrc?id=574566207&key=579621905",
    	   *                 "url":"https://api.bzqll.com/music/netease/url?id=574566207&key=579621905",
    	   *                 "time":198},
    	   *                  {"id":"574566207",
    	   *                 "name":"盗将行","
    	   *                 singer":"花粥/马雨阳",
    	   *                 "pic":"https://api.bzqll.com/music/netease/pic?id=574566207&imgSize=300&key=579621905",
    	   *                 "lrc":"https://api.bzqll.com/music/netease/lrc?id=574566207&key=579621905",
    	   *                 "url":"https://api.bzqll.com/music/netease/url?id=574566207&key=579621905",
    	   *                 "time":198}
    	   *                 
    	   *            ]  
    	   **/
    	  JSONArray array = object.getJSONObject("data").getJSONArray("songs");//获取json数组
    	  /**
    	   * 第一个参数为需转的json数组，第二个参数为对应实体类，
    	   */
          List list = (List)JSONArray.toList(array, new music(), new JsonConfig());  
          music m = list.get(20);
          System.out.println(object);
          System.out.println(m.getLrc());
         }
}