将JSON转换成MAP的工具类

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);

    }

}