{"setInformation":{"machine_id":"0a9ead53-d642-4f0c-a58c-0ce38","authorization":"1","workers_phone":"","workers_name":"","shortest_digits":"9","long_digits":"21","sweep_code_interval":"300","offline_scan":"0","duplicate_entry":"0","relation_id":"6cb81241-56ac-96dd-610a-58dc5bf24524","multiple_cameras":"0","camera_record":"0"},"machine_id":"0a9ead53-d642-4f0c-a58c-0ceaad88c138"}请问如何将这段内容 做分割  想以“：” 字符开始，  “，”字符结束想取每个字符 中间的数值，因为传过来的数据 字符有时候长有时候短，没办法用mid 返回文本串指定位置， 只能通过开始字符跟结束字符