code: public Map<?, ?> formatJSON2Map(String json) {
  		Map<?, ?> map = null;
  		try {
  			map = MAPPER.readValue(json, Map.class);
  		} catch (Exception e) {
  			LOGGER.error("formatJsonToMap error, json = " + json, e);
  		}
  		return map;
  	}
docs: 将json转化为map
  
  @param json
  @return