code: public Object eval(String path) {
          String key = pathToKey(path);
          return jsonStore.containsKey(key) ? jsonStore.get(key) : JSONPath.eval(jsonObject, checkPath(path));
      }
docs: 根据路径获取对象
  
  @param path <a href= "https://github.com/alibaba/fastjson/wiki/JSONPath">路径语法</a>
  
  @return 对象