map和json互转

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/lzc1993lzc/article/details/83055573

/**
	 * 转换MP自己定义的JSONArray对象为List<Map>对象
	 * @param obj
	 * @return
	 */
	public static List<Map<String,String>> jsonArrToList(JSONArray arr){
		String key = null;
		String val = null;
		Iterator<String> it = null;
		JSONObject obj = null;
		Map<String,String> map = null;
		List<Map<String, String>> list = new ArrayList<Map<String,String>>();
		
		try {
			for (int i = 0; i < arr.length(); i++) {
				map = new HashMap<String, String>();
				obj = arr.getJSONObject(i);
				it = obj.keys();
				while(it.hasNext()){
					key = it.next();
						val =  (obj.get(key)).toString();
						map.put(key, val);
				}
				list.add(map);
			}			
		} catch (JSONException e) {
			e.printStackTrace();
		}
		return list;
	}
	
	/**
	 * 转换MP自己定义的JSONArray对象为List<Map>对象
	 * @param obj
	 * @return
	 */
	public static JSONArray listToJsonArr(List<Map<String,String>> list){
		String key = null;
		String val = null;
		Iterator<String> it = null;
		JSONObject obj = null;
		Map<String,String> map = null;
		
		JSONArray arr = new JSONArray();
		try {
			for (int i = 0; i < list.size(); i++) {
				obj = new JSONObject();
				map = list.get(i); 
				it = map.keySet().iterator();
				while(it.hasNext()){
					key = it.next();
						val =  (map.get(key)).toString();
						obj.put(key, val);
				}
				arr.put(obj);
			}			
		} catch (JSONException e) {
			e.printStackTrace();
		}
		return arr;
	}