Json字符串转Map对象-白红宇

Json字符串转Map对象

阅读量：5886 次

发布时间：2019-06-19

本文共 2175 字，大约阅读时间需要 7 分钟。

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 PandantTools {             public static List
     
      > parseJSON2List(String jsonStr){          JSONArray jsonArr = JSONArray.fromObject(jsonStr);          List
      
       
        > list = new ArrayList
        
         
          >(); Iterator
          
            it = jsonArr.iterator(); while(it.hasNext()){ JSONObject json2 = it.next(); list.add(parseJSON2Map(json2.toString())); } return list; } public static Map
           
             parseJSON2Map(String jsonStr){ Map
            
              map = new HashMap
             
              (); //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
              
               
                > list = new ArrayList
                
                 
                  >(); Iterator
                  
                    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
                   
                    
                     > 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
                     
                       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
                      
                       
                        > list = getListByUrl(url); System.out.println(list); } }