LiveItemDao
+listLiveItems
LiveItemDTO
-id-areaCode-scenicAreaId-title-rank-liveUrl-voiceUrl
LiveItemServiceImpl
+ LiveItemDao:liveItemDao
-listLiveItems( )-createLiveItem( )-getDetailById( )-saveLiveItem( )-delete( )
LiveItemController
-LiveItemService：liveItemService
LiveItemQuery
-scenicAreaId-areaCode-keyword-status
Pagination
-offset-limit
LiveItemService
PageQuery
-sort-order
BaseMapper<T>
-insert( )-deleteById( )-updateById( )-selectById( )-selectList( )
