1. 默认路径

//win 路径
C:\Users\Administrator\AppData\Local\xxx\xxxx\QML\OfflineStorage\Databases\

//linux 路径
./root/.local/share/xxx/xxxx/QML/OfflineStorage/Databases/

//文件名
xxxxxxxxxxxxxxxxxxxx.ini
xxxxxxxxxxxxxxxxxxxx.sqlite

2. 设置路径

	//设置数据库存储路径为 "./"
    engine.setOfflineStoragePath("./");