Map和String类型之间的转换

public static void main(String[] args) {
        Map<String,Object> map = new HashMap<String,Object>();
        Map<String,String> mapNew = new HashMap<String,String>();
        map.put("1", 11);
        map.put("2", 22);
        map.put("3", 33);
        map.put("4", 44);
        for (String string : map.keySet()) {
            mapNew.put(string, map.get(string).toString());
        }
        
        JSONObject jsonObject=JSONObject.fromObject(mapNew);
        
        String string = jsonObject.toString();
        System.out.println(string);
        
        
        JSONObject  jasonObject = JSONObject.fromObject(string);
        Map<String,Object> map1 = (Map<String,Object>)jasonObject;
        for (String s : map1.keySet()) {
            System.out.println("s:"+map.get(s).toString());
        }
    }