使用hasmap制作的东西，里面用到了has树。-Use hasmap produced something, which has used a tree.

JOSN数据的处理，解析请求服务器返回的数据，以键值对的形式存放到Hasmap中-The data processing JOSN, resolution requests the server returns the data stored in the form of key-value pairs to Hasmap in

hashmap its useful for you you will like it