json转map和list

package com.xxxx.util;

import java.io.BufferedReader;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.net.URL;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.Iterator;

import java.util.List;

import java.util.Map;

import net.sf.json.JSONArray;

import net.sf.json.JSONObject;

public class MapTools {

public static List<Map<String, Object>> parseJSON2List(String jsonStr){
    JSONArray jsonArr = JSONArray.fromObject(jsonStr);
    List<Map<String, Object>> list = new ArrayList<Map<String,Object>>();
    Iterator<JSONObject> it = jsonArr.iterator();
    while(it.hasNext()){
        JSONObject json2 = it.next();
        list.add(parseJSON2Map(json2.toString()));
    }
    return list;
}
 

public static Map<String, Object> parseJSON2Map(String jsonStr){
    Map<String, Object> map = new HashMap<String, Object>();
    //最外层解析
    JSONObject json = JSONObject.fromObject(jsonStr);
    for(Object k : json.keySet()){
        Object v = json.get(k);
        //如果内层还是数组的话，继续解析
        if(v instanceof JSONArray){
            List<Map<String, Object>> list = new ArrayList<Map<String,Object>>();
            Iterator<JSONObject> it = ((JSONArray)v).iterator();
            while(it.hasNext()){
                JSONObject json2 = it.next();
                list.add(parseJSON2Map(json2.toString()));
            }
            map.put(k.toString(), list);
        } else {
            map.put(k.toString(), v);
        }
    }
    return map;
}
 

public static List<Map<String, Object>> getListByUrl(String url){
    try {
        //通过HTTP获取JSON数据
        InputStream in = new URL(url).openStream();
        BufferedReader reader = new BufferedReader(new InputStreamReader(in));
        StringBuilder sb = new StringBuilder();
        String line;
        while((line=reader.readLine())!=null){
            sb.append(line);
        }
        return parseJSON2List(sb.toString());
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}
 

public static Map<String, Object> getMapByUrl(String url){
    try {
        //通过HTTP获取JSON数据
        InputStream in = new URL(url).openStream();
        BufferedReader reader = new BufferedReader(new InputStreamReader(in));
        StringBuilder sb = new StringBuilder();
        String line;
        while((line=reader.readLine())!=null){
            sb.append(line);
        }
        return parseJSON2Map(sb.toString());
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}
 
 
//test
public static void main(String[] args) {
    String url = "http://...";
    List<Map<String,Object>> list = getListByUrl(url);
    System.out.println(list);
}
           

}