Revert "Revert "Revert "添加Photo类"""

This reverts commit 756f3543b256d2d846d4b659e420b6773d92f963.
Revert "Revert "添加Photo类""

This reverts commit 31e449f5880596207f211abff579e51ecd50293d.
Revert "添加Photo类"

This reverts commit bf7cb48a8b44e53e49a986481061a750a100f860.
Revert "删除photo小写文件"

This reverts commit aa6f75eab3d3239fbb8515a2c32cd29273bbfa0f.
Revert "删除photo小写文件名"

This reverts commit bcf29d691b8c2cd6d6e4cf7b372f8f10a7a5793b.